Question 1

Decrease in RBC count is?

Accepted Answer

Answer reason: A decreased red blood cell count reduces oxygen-carrying capacity of blood and is termed anemia. Polycythemia is the opposite condition, involving increased RBC mass. Leukopenia refers to low white blood cells, and thrombocytopenia refers to low platelets, so they do not describe decreased RBCs.
Category reason: This question tests definitions of blood cell count abnormalities, which is a core topic in Hematology rather than a nursing intervention or prioritization scenario.

Question 2

The most abundant blood cells are?

Accepted Answer

Answer reason: They make up the vast majority of formed elements in blood, with counts in the millions per microliter, far exceeding platelets and white blood cells. Their primary function is gas transport via hemoglobin, which necessitates high circulating numbers to meet oxygen delivery needs. By comparison, platelets are typically in the hundreds of thousands per microliter and WBCs in the thousands per microliter; neutrophils are only a subset of WBCs.
Category reason: This is a foundational question about relative cellular composition of blood, which is part of Hematology rather than a nursing intervention or patient-care decision.

Question 3

Which blood group is known as the universal donor?

Accepted Answer

Answer reason: O negative blood lacks A, B, and Rh antigens, making it compatible for emergency transfusions when the recipient’s blood type is unknown.
Category reason: The question tests foundational knowledge of blood types and transfusion compatibility, which falls under the Hematology leaf category.

Question 4

101 - ------ is the reduction in the amount of circulating hemoglobin , red blood cells or both?

Accepted Answer

Answer reason: This condition is defined by decreased circulating hemoglobin concentration and/or reduced red blood cell mass, leading to diminished oxygen-carrying capacity of blood. Polycythemia is the opposite (increased RBC mass), hemophilia is a coagulation factor disorder causing bleeding, and leucopenia refers to low white blood cell count rather than red cells or hemoglobin. Therefore the definition in the stem aligns with anemia.
Category reason: This question tests a definition of a blood disorder involving hemoglobin and red blood cells, which falls under Hematology rather than nursing intervention/priority decision-making.

Question 5

Thalassemia is ?

Accepted Answer

Answer reason: a- Microcytic anemia Thalassemia is a hemoglobin synthesis disorder that reduces globin chain production, leading to decreased hemoglobin content per red blood cell. This results in smaller-than-normal RBCs (low MCV) and hypochromia, classifying it as a microcytic anemia. Macrocytic anemia is typically due to impaired DNA synthesis (e.g., B12/folate deficiency), and normocytic anemia is more characteristic of acute blood loss or anemia of chronic disease early on.
Category reason: This item tests classification of anemia based on red blood cell indices and hemoglobin synthesis disorders, which is core content in Hematology rather than nursing care decision-making.

Question 6

Vit B12 deficiency lead to

Accepted Answer

Answer reason: Vitamin B12 is required for DNA synthesis in rapidly dividing cells, especially erythroid precursors in the bone marrow. Deficiency causes impaired nuclear maturation with relatively preserved cytoplasmic development, producing macrocytosis and megaloblastic changes. This results in a macrocytic (megaloblastic) anemia rather than microcytic or normocytic patterns. Ineffective erythropoiesis can also lead to hypersegmented neutrophils and elevated MCV.
Category reason: This item tests the type of anemia caused by a vitamin deficiency, which is a core blood/erythropoiesis concept within Hematology rather than a nursing intervention or prioritization scenario.

Question 7

Lymphocyte represent ................. of total leukocyte:

Accepted Answer

Answer reason: Normal adult differential white blood cell counts typically show lymphocytes comprising about 20–40% of total leukocytes. The other ranges correspond to different leukocyte types: neutrophils are commonly 50–70%, monocytes about 2–8%, and eosinophils about 1–5%. Therefore, the percentage range that matches lymphocytes is the 20–40% option.
Category reason: This question tests knowledge of normal leukocyte differential percentages, which is a core topic in Hematology rather than a nursing intervention or prioritization scenario.

Question 8

Peripheral, pale inclusions that push out the cell membrane and composed of hemoglobin:

Accepted Answer

Answer reason: d- Heinz body These inclusions are precipitates of denatured hemoglobin within red blood cells, classically seen with oxidative stress (e.g., G6PD deficiency or exposure to oxidant drugs). They can distort the RBC membrane and may lead to “bite cells” after splenic removal of the inclusions. Howell-Jolly bodies are nuclear DNA remnants, Pappenheimer bodies are iron-containing granules, and Cabot rings are remnants of mitotic spindle material rather than hemoglobin precipitates.
Category reason: This question tests identification of red blood cell inclusions and their composition, which is a foundational blood/cell morphology concept within Hematology rather than a nursing management decision.

Question 9

Which blood group of human body is "universal receivers"?

Accepted Answer

Answer reason: In the ABO system, individuals with AB blood type have both A and B antigens on their red blood cells and therefore do not naturally produce anti-A or anti-B antibodies in their plasma. Because they lack these antibodies, they can receive red blood cells from A, B, AB, or O donors without an immediate ABO-mediated hemolytic transfusion reaction. (Rh factor still matters; AB+ is the universal recipient when considering both ABO and Rh compatibility.).
Category reason: This question tests foundational knowledge of ABO blood group antigen–antibody compatibility and transfusion principles, which is a core topic in Hematology rather than a nursing-care judgment scenario.

Question 10

Hematologist is the doctor of...?

Accepted Answer

Answer reason: Hematology is the branch of medicine focused on blood, blood-forming organs (like bone marrow), and blood diseases. Hematologists diagnose and manage conditions such as anemia, leukemias/lymphomas, clotting and bleeding disorders, and abnormal blood counts. The other options correspond to different specialties (nephrology for kidney, cardiology for heart) or are not a medical specialty focus (water).
Category reason: This question tests recognition of the medical specialty term related to blood and blood disorders, which falls under Hematology as a foundational biomedical/science topic rather than a nursing care decision.

Question 11

Leukemia is a type of cancer in which there is an abnormal increase in one of the following?

Accepted Answer

Answer reason: Leukemia is a malignancy of hematopoietic tissues characterized by clonal proliferation of abnormal leukocytes and/or their precursors in the bone marrow and blood. This commonly presents with elevated or dysfunctional leukocyte populations, even though normal marrow function is suppressed. As a result, anemia and thrombocytopenia may occur, but they are typically decreases due to marrow crowding rather than the defining abnormal increase.
Category reason: This is a foundational question about what cell line is primarily increased in leukemia, which falls under blood and blood-forming disorders studied in Hematology rather than nursing interventions.

Question 12

Which of the following condition, the RBCs are microcytic & hypochromic?

Accepted Answer

Answer reason: Iron deficiency reduces hemoglobin synthesis, producing smaller RBCs (low MCV) with increased central pallor (hypochromia). This morphology is the classic peripheral smear pattern for iron deficiency and often correlates with low ferritin and low serum iron. Pernicious and megaloblastic anemia cause macrocytosis due to impaired DNA synthesis, while many hemolytic anemias are typically normocytic with reticulocytosis rather than microcytic hypochromic cells.
Category reason: This question tests recognition of RBC morphology patterns (microcytic, hypochromic) and their association with specific anemia etiologies, which is a core Hematology foundational science concept rather than a nursing intervention/priority decision.

Question 13

What type of blood cells is Hemoglobin found in?

Accepted Answer

Answer reason: Hemoglobin is the iron-containing protein responsible for binding and transporting oxygen (and some carbon dioxide) in the bloodstream. It is packaged inside erythrocytes, which are specialized cells optimized for gas transport and lack a nucleus to maximize hemoglobin content. White blood cells are primarily immune cells and do not contain hemoglobin for oxygen carriage. Platelets are cell fragments involved in clotting and likewise do not contain hemoglobin as their main functional component.
Category reason: This is a foundational question about which blood element contains hemoglobin, a core topic in the study of blood components and their functions, which falls under Hematology rather than nursing care decision-making.

Question 14

Bilirubin is a breakdown product of?

Accepted Answer

Answer reason: Bilirubin is produced during the normal breakdown of heme from hemoglobin after senescent red blood cells are removed by the reticuloendothelial system. Heme is converted to biliverdin and then to unconjugated bilirubin, which travels to the liver bound to albumin. The liver conjugates bilirubin for excretion into bile, and disruptions at any step can cause jaundice and elevated bilirubin levels.
Category reason: This question tests the biochemical/hematologic origin of bilirubin from red blood cell hemoglobin catabolism, which is a foundational concept in Hematology rather than a nursing intervention scenario.

Question 15

The largest type of WBC is?

Accepted Answer

Answer reason: Monocytes are the largest circulating leukocytes (typically ~12–20 µm) and have abundant cytoplasm with a characteristic kidney-shaped nucleus. Neutrophils, lymphocytes, and basophils are generally smaller in peripheral blood. Monocytes migrate into tissues to become macrophages and dendritic cells, contributing to phagocytosis and antigen presentation.
Category reason: This question tests identification of a blood cell type by a basic characteristic (cell size), which is part of hematology and foundational biomedical science rather than nursing decision-making.

Question 16

RBC lifespan:

Accepted Answer

Answer reason: Red blood cells circulate for about 120 days before being removed primarily by the spleen and reticuloendothelial system. Their limited lifespan is due to lack of a nucleus/organelles, which prevents protein repair and makes membranes progressively less deformable. This baseline value is clinically relevant because shortened survival contributes to hemolytic anemias, while normal survival supports stable hemoglobin levels when production matches loss.
Category reason: This is a foundational fact about the normal survival time of erythrocytes, which is core blood physiology/hematology knowledge rather than a nursing intervention or patient-care decision.

Question 17

Which of the following is a late symptom of polycythemia vera?

Accepted Answer

Answer reason: Polycythemia vera causes increased red cell mass and basophil/mast-cell activity, and a characteristic later clinical manifestation is aquagenic itching that can become prominent as the disease progresses. Hyperviscosity symptoms such as headache and dizziness are common earlier features, reflecting impaired microcirculatory flow. Nausea/vomiting are not typical hallmark manifestations, and shortness of breath is less specific and more often related to complications rather than a classic late symptom.
Category reason: This question tests disease manifestations of a hematologic myeloproliferative disorder (polycythemia vera), which is core Hematology content rather than nursing intervention/prioritization.

Question 18

Erythrocyte Sedimentation Rate (ESR) What are the most important cases in which the ESR decreases?

Accepted Answer

Answer reason: ESR is primarily influenced by plasma proteins (especially fibrinogen) and red cell properties/hematocrit. When hematocrit is elevated (polycythemia), red cells are more crowded and fall more slowly, leading to a lower ESR. By contrast, myocardial infarction and inflammatory states typically raise ESR, and low fibrinogen would also decrease ESR but the question asks for the most important case, for which elevated hematocrit is a classic strong factor.
Category reason: This item tests how ESR changes with blood composition (hematocrit and plasma proteins), which is a core concept in hematology and laboratory interpretation rather than nursing interventions.

Question 19

When infected with viruses like Rabies, Herpes simplex, or Varicella zoster, which type of white blood cell usually increases?

Accepted Answer

Answer reason: Viral infections characteristically trigger a lymphocytic response, reflecting activation and proliferation of T cells (and B cells) involved in antiviral immunity. In contrast, neutrophils more commonly rise with acute bacterial infections and inflammation. Therefore the typical WBC differential change with rabies, HSV, or VZV is lymphocytosis rather than neutrophilia.
Category reason: This asks about which leukocyte type increases with viral infections, which is a core concept in blood/immune cell differentials and belongs to Hematology.

Question 20

Bone marrow produces:

Accepted Answer

Answer reason: Bone marrow is the primary site of hematopoiesis, where hematopoietic stem cells differentiate into erythrocytes, leukocytes, and platelets. This function is essential for oxygen transport, immune defense, and hemostasis. While hormones, enzymes, and vitamins are produced or processed by various organs and tissues, they are not the defining output of bone marrow.
Category reason: This is a foundational question about blood cell formation (hematopoiesis) and the function of bone marrow, which is core Hematology content rather than a nursing care decision.

Question 21

Anemia may occur due to deficiency of ----------------?

Accepted Answer

Answer reason: Iron is required for hemoglobin synthesis and normal red blood cell production. Deficiency leads to microcytic, hypochromic anemia with pallor and fatigue due to reduced oxygen-carrying capacity. The other listed nutrients are not primary causes of anemia in the typical nutritional deficiency context: iodine relates to thyroid function, calcium to bone metabolism, and vitamin A deficiency more commonly affects vision and epithelial integrity.
Category reason: This question tests a foundational cause of anemia based on nutrient deficiency and hemoglobin/RBC production, which is core blood science content under Hematology rather than nursing-care decision-making.

Question 22

Hemoglobin is composed of?

Accepted Answer

Answer reason: Hemoglobin is a tetramer made of four globin polypeptide chains, and each chain contains one heme prosthetic group. Each heme contains an iron atom capable of binding one oxygen molecule, allowing up to four oxygen molecules per hemoglobin. This structural organization is fundamental to oxygen transport and the cooperative binding behavior of hemoglobin. The other options understate the number of subunits or omit the essential globin protein component.
Category reason: This question tests the molecular composition/structure of hemoglobin in red blood cells, which is a core concept within Hematology rather than a nursing intervention or safety decision.

Question 23

Normal platelets count in human _

Accepted Answer

Answer reason: Normal platelet counts are typically about 150,000–450,000/µL, so this range is the closest among the choices. Values like 20,000–50,000/µL indicate significant thrombocytopenia with elevated bleeding risk. Platelet counts are a core hematology laboratory parameter used to assess primary hemostasis and to screen for bleeding or thrombotic disorders.
Category reason: This is a factual question about normal blood cell (platelet) laboratory ranges, which is part of Hematology rather than a nursing intervention or prioritization decision.

Question 24

Bone cells are produced by??

Accepted Answer

Answer reason: Hematopoietic cell production occurs in the bone marrow, but among the given options the spleen is the only organ associated with blood cell production, particularly during fetal life and in extramedullary hematopoiesis in certain diseases. Retinol (vitamin A) influences growth and epithelial differentiation and can affect bone remodeling, but it does not directly “produce” bone cells. Folic acid supports DNA synthesis and red blood cell formation, not osteogenesis. Therefore this option is the best match available.
Category reason: This item tests foundational knowledge about sites and factors involved in cell production (hematopoiesis), which is best categorized under Hematology rather than nursing intervention or clinical decision-making.

Question 25

Smallest blood element?

Accepted Answer

Answer reason: Platelets are small, anucleate cell fragments (thrombocytes) typically about 2–3 µm in diameter. Red blood cells are larger (~7–8 µm), and white blood cells are generally larger still (~10–20 µm). Plasma is the liquid component of blood rather than a formed cellular element, so it is not considered a “blood element” in the same way as formed elements.
Category reason: This is a foundational question about the formed elements of blood and their relative size, which is a core concept in Hematology rather than nursing interventions or clinical prioritization.

Question 26

Which of the following is a marker of hemolysis?

Accepted Answer

Answer reason: Hemolysis leads to increased breakdown of hemoglobin, producing more unconjugated bilirubin and causing serum bilirubin to rise. Other typical hemolysis markers include increased LDH and decreased haptoglobin due to binding of free hemoglobin. The bone marrow usually responds with reticulocytosis (not a low reticulocyte count) unless there is marrow failure or nutrient deficiency.
Category reason: This question tests laboratory markers associated with red blood cell destruction, which is core content in Hematology rather than nursing interventions or prioritization.

Question 27

It’s function is to transport oxygen from the lung to the tissue?

Accepted Answer

Answer reason: Hemoglobin in red blood cells binds oxygen in the lungs (at high alveolar PO2) and delivers it to peripheral tissues where PO2 is lower, facilitating release. Haptoglobin primarily binds free hemoglobin in plasma to prevent iron loss and kidney injury, not oxygen transport. Bilirubin is a heme breakdown product carried to the liver for conjugation and excretion. Myoglobin stores oxygen within muscle cells and aids intramuscular diffusion rather than serving as the main blood oxygen carrier.
Category reason: This is a foundational question about the role of blood components in oxygen transport, which is primarily studied within Hematology rather than nursing interventions or clinical prioritization.

Question 28

Which of the following is NOT a granulocyte?

Accepted Answer

Answer reason: Granulocytes are white blood cells characterized by prominent cytoplasmic granules and include neutrophils, eosinophils, and basophils. Lymphocytes lack these specific granules and are classified as agranulocytes (along with monocytes). Therefore, this option is the one that is not a granulocyte. This distinction is fundamental to leukocyte classification and function in immunity.
Category reason: This question tests classification of white blood cells into granulocytes vs agranulocytes, which is a core topic in Hematology.

Question 29

Which blood disorder is associated with an increased RBC count?

Accepted Answer

Answer reason: This condition is defined by an abnormally elevated red blood cell mass, which raises the RBC count and typically increases hematocrit/hemoglobin as well. It can be primary (e.g., due to myeloproliferation) or secondary (e.g., chronic hypoxia or excess erythropoietin). In contrast, leukemia primarily involves abnormal white blood cells, thrombocytopenia involves low platelets, and hemophilia is a coagulation factor deficiency with normal RBC count unless bleeding occurs.
Category reason: This question tests foundational knowledge of blood disorders and which one increases red blood cell count, which is a core concept within Hematology rather than nursing management or interventions.

Question 30

The most common type of anemia worldwide is?

Accepted Answer

Answer reason: It is the leading global cause of anemia because iron intake may be inadequate, absorption can be impaired, and chronic blood loss (e.g., parasitic infections, heavy menstrual bleeding, gastrointestinal bleeding) is common worldwide. Iron deficiency reduces hemoglobin synthesis, producing microcytic, hypochromic red cells and reduced oxygen-carrying capacity. The other options are important but are far less prevalent globally and are usually limited to specific etiologies or populations.
Category reason: This question tests foundational knowledge about the epidemiology and causes of anemia, which falls under blood disorders and their mechanisms.

Question 31

Which of the following cells is not seen in blood?

Accepted Answer

Answer reason: d. megakaryocytes These are large bone marrow cells that produce platelets by cytoplasmic fragmentation and therefore normally remain in the marrow rather than circulating. Peripheral blood normally contains erythrocytes and leukocytes as mature circulating cells. Platelets are also found in blood, but they are cell fragments derived from these marrow cells, not the intact parent cells. Seeing intact parent cells in blood would be abnormal and suggest severe marrow disruption.
Category reason: This question tests knowledge of normal formed elements of blood and where specific hematopoietic cells reside (bone marrow vs peripheral blood), which is core Hematology content.

Question 32

A 22-year-old woman with sickle cell disease presents with chronic anemia. She is otherwise stable and is being evaluated for routine supplementation to support red blood cell production. Which of the following supplements is most appropriate for this patient?

Accepted Answer

Answer reason: Sickle cell disease causes chronic hemolysis with increased bone marrow turnover, which raises folate requirements for ongoing erythropoiesis. Routine folic acid supplementation helps support red blood cell production in these patients. Iron is not routinely indicated unless iron deficiency is confirmed, as repeated transfusions can lead to iron overload. Vitamin B12 is only needed if deficiency is present, and vitamin C does not directly address the increased folate demand from hemolysis.
Category reason: This question tests knowledge of anemia/hemolysis in sickle cell disease and which nutrient supports erythropoiesis, which is a core Hematology concept rather than a nursing intervention/prioritization task.

Question 33

Part of blood without cell of protein is known as?

Accepted Answer

Answer reason: After blood clots, the clotting proteins (especially fibrinogen) are consumed in forming the clot, and the remaining liquid portion is serum. Plasma is the liquid component of blood before clotting and therefore contains clotting proteins. Whole blood includes cellular elements (RBCs, WBCs, platelets) plus plasma, so it is not the correct term for the protein-depleted fraction described.
Category reason: This tests identification of blood components (plasma vs serum) and their protein content, which is core Hematology/foundational biomedical knowledge rather than a nursing intervention or clinical judgment scenario.

Question 34

A patient with a history of excessive bleeding and joint pain is likely to have which type of hemorrhagic disorder?

Accepted Answer

Answer reason: Hemarthrosis (bleeding into joints) causing joint pain and swelling is a classic feature of coagulation factor deficiencies, especially factor VIII or IX deficiency. Platelet disorders typically cause mucocutaneous bleeding (petechiae, epistaxis, gum bleeding) rather than deep joint bleeding. Vitamin K deficiency can impair multiple clotting factors but does not characteristically present with recurrent joint hemorrhages. DIC is an acute systemic consumptive coagulopathy with widespread bleeding and thrombosis rather than isolated recurrent joint bleeding.
Category reason: This item tests recognition of a hematologic bleeding disorder based on hallmark clinical features (hemarthrosis), which is foundational biomedical knowledge rather than a nursing intervention scenario.

Question 35

A nurse is concerned about a client’s ability to withstand exposure to pathogens. Which blood component should the nurse monitor?

Accepted Answer

Answer reason: Neutrophils are the primary white blood cells responsible for early defense against bacterial and fungal pathogens through phagocytosis. Low neutrophil counts (neutropenia) significantly increase infection risk and reduce the ability to withstand exposure to pathogens. Platelets are mainly for clotting, while hemoglobin and erythrocytes primarily relate to oxygen transport rather than immune defense.
Category reason: This item tests which blood cell line provides protection against infection, a foundational concept of blood and immune function within Hematology.

Question 36

Which blood cells fight infections?

Accepted Answer

Answer reason: They are the primary immune cells responsible for identifying and eliminating pathogens through mechanisms such as phagocytosis, antibody production, and cell-mediated immunity. Red blood cells mainly transport oxygen and carbon dioxide and do not provide immune defense. Platelets primarily function in hemostasis and clot formation rather than infection control.
Category reason: This question tests foundational knowledge of blood cell functions and immune defense, which falls under Hematology rather than nursing care decision-making.

Question 37

The nurse is caring for a client with a suspected diagnosis of aplastic anemia. Which tests should the nurse anticipate to be performed to confirm the diagnosis?

Accepted Answer

Answer reason: Aplastic anemia is defined by bone marrow failure with hypocellular marrow and reduced hematopoietic precursors, so marrow examination is required for confirmation. A CBC commonly shows pancytopenia and is important for suspicion and monitoring, but it is not definitive because other disorders can also cause pancytopenia. The Schilling test evaluates vitamin B12 absorption (pernicious anemia), and a sickle cell screen evaluates hemoglobin S; neither confirms aplastic anemia.
Category reason: This question tests diagnostic confirmation of a blood/marrow disorder (aplastic anemia), which is a foundational hematology concept rather than a nursing intervention or prioritization scenario.

Question 38

Breakdown of RBC is known as-?

Accepted Answer

Answer reason: RBC breakdown refers to destruction of erythrocytes with release of hemoglobin, which occurs physiologically at end of RBC lifespan or pathologically (intravascular or extravascular). Erythropoiesis is the production of RBCs, erythropoietin is the hormone that stimulates RBC production, and an erythroblast is an immature RBC precursor. Therefore the term that specifically denotes RBC destruction is hemolysis.
Category reason: This question tests a core blood/erythrocyte terminology concept (RBC production vs hormone vs precursor vs destruction), which falls under Hematology.

Question 39

Abnormal erythrocytes are mainly destroyed in-?

Accepted Answer

Answer reason: The spleen is the primary site of extravascular hemolysis, where macrophages in the red pulp recognize and remove senescent or abnormally shaped/damaged erythrocytes. It performs “culling” (removing entire RBCs) and “pitting” (removing inclusions) as part of quality control for circulating red cells. While the liver can also contribute via Kupffer cells, the spleen is classically the main organ responsible for clearing abnormal erythrocytes.
Category reason: This question tests foundational blood physiology/hematology—specifically where erythrocyte clearance and hemolysis occur—rather than a nursing intervention or patient-care decision.

Question 40

A decrease in the number of platelets in the blood called?

Accepted Answer

Answer reason: The suffix “-penia” means a deficiency or decreased number, and “thrombocyto-” refers to platelets. A low platelet count reduces primary hemostasis, increasing bleeding risk such as petechiae, easy bruising, mucosal bleeding, and prolonged bleeding from minor cuts. By contrast, thrombocytosis indicates an elevated platelet count, neutropenia is low neutrophils, and leukopenia is low total white blood cells.
Category reason: This question tests terminology for decreased platelet count, which is a core concept in blood cell disorders and belongs to Hematology.

Question 41

Haematopoiesis in adults occurs at _

Accepted Answer

Answer reason: In adults, blood cell production is primarily carried out by hematopoietic stem cells located in the red bone marrow, especially in the axial skeleton (pelvis, vertebrae, sternum, ribs) and proximal long bones. The liver and spleen are major hematopoietic organs during fetal life, but this shifts to marrow after birth. In adults, liver/spleen hematopoiesis is typically seen only in pathologic “extramedullary hematopoiesis” (e.g., myelofibrosis).
Category reason: This question tests where blood cells are produced in adulthood, which is a core concept of blood formation and hematopoietic physiology studied in Hematology.

Question 42

Blood group where 1st discovered by _?

Accepted Answer

Answer reason: The ABO blood group system was first described by Karl Landsteiner in 1900–1901 through observing agglutination reactions between different individuals’ blood samples. This discovery established the immunohematologic basis for safe blood transfusion by matching donor and recipient blood types. The other listed scientists are notable for bacteriology and immunology/chemotherapy but are not credited with discovering blood groups.
Category reason: This question tests foundational knowledge about the discovery of the ABO blood group system, a core topic in blood typing and transfusion science, which fits Hematology rather than nursing care decision-making.

Question 43

If person is having blood group A then ______ are present in that person’s blood.?

Accepted Answer

Answer reason: In the ABO system, people form naturally occurring antibodies against the A/B antigen they do not have on their red blood cells. Blood group A has A antigen on RBCs, so the plasma contains anti-B antibodies. This is clinically important because exposure to B antigen (e.g., transfusing type B or AB blood) can trigger hemolytic transfusion reactions due to antibody-mediated agglutination and complement activation. Therefore the antibody expected in type A blood is anti-B.
Category reason: This question tests foundational knowledge of the ABO blood group system and naturally occurring antibodies, which is a core topic in Hematology rather than nursing care decision-making.

Question 44

A decrease in the number of platelets in the blood called

Accepted Answer

Answer reason: The suffix “-penia” indicates a deficiency or decreased count, and thrombocytes are platelets. Therefore, a low platelet count is termed thrombocytopenia and is associated with increased bleeding risk (e.g., petechiae, mucosal bleeding). In contrast, thrombocytosis refers to an elevated platelet count, while leukopenia and neutropenia describe decreased white blood cells and neutrophils, respectively.
Category reason: This is a terminology/definition question about blood cell components and abnormal counts, which is core Hematology knowledge rather than a nursing intervention scenario.

Question 45

A high white blood cell (WBC) count may indicate?

Accepted Answer

Answer reason: Leukocytosis (an elevated WBC count) most commonly reflects an inflammatory response, frequently due to bacterial infection, and is a key screening clue when evaluating fever or systemic signs. Anemia is primarily related to red blood cell mass/hemoglobin rather than white cells. Dehydration may cause hemoconcentration and mildly elevate some measured values, but it is not the classic primary interpretation of a high WBC count. Thrombocytopenia refers to low platelets and does not explain an elevated WBC count.
Category reason: This question tests interpretation of a complete blood count parameter (WBC) and its clinical significance, which is a hematology/lab concepts topic rather than a nursing intervention or prioritization scenario.

Question 46

Which part of the blood helps stop bleeding by clotting?

Accepted Answer

Answer reason: They are the primary cellular component responsible for hemostasis by adhering to damaged endothelium and aggregating to form an initial platelet plug. They also provide a phospholipid surface that supports activation of the coagulation cascade to stabilize the clot with fibrin. In contrast, red blood cells mainly transport oxygen and carbon dioxide, and white blood cells primarily function in immune defense rather than clot formation.
Category reason: This question tests the function of blood components in hemostasis/coagulation, which is a core topic within Hematology rather than a nursing care decision-making scenario.

Question 47

The lifespan of the the average RBC in a newborn is?

Accepted Answer

Answer reason: Newborn erythrocytes have a shorter survival than adult red cells due to physiologic differences in neonatal RBC membranes and metabolism and the transition from fetal to postnatal circulation. Adult RBC lifespan is about 120 days, whereas typical neonatal RBC lifespan is closer to ~90–100 days. This shortened lifespan contributes to increased bilirubin production and the common occurrence of physiologic jaundice in newborns.
Category reason: This item tests a factual property of red blood cells (RBC lifespan) in newborns, which is foundational hematology/physiology knowledge rather than a nursing intervention or prioritization scenario.

Question 48

BLOOD CELLS are produced in ??

Accepted Answer

Answer reason: Hematopoiesis (formation of red blood cells, most white blood cells, and platelets) occurs primarily in the red bone marrow in children and adults. The kidney mainly produces erythropoietin, which stimulates red cell production but is not the production site itself. The spleen is involved in filtering blood and immune functions and can participate in extramedullary hematopoiesis in certain diseases, but it is not the primary normal site. The stomach has no role in blood cell formation.
Category reason: This question tests where hematopoiesis occurs, which is a foundational blood/immune system concept covered under Hematology rather than nursing care actions.

Question 49

The process of blood cells formation is called..........?

Accepted Answer

Answer reason: C.erythropoesis This item is asking for the term describing formation/production of blood cells; among the choices, only erythropoiesis refers to a blood-cell production process (specifically red blood cell production in bone marrow, regulated largely by erythropoietin). Thrombocytosis and leucocytosis are increased platelet and white blood cell counts, respectively, not formation processes. Hemolysis refers to destruction of red blood cells, the opposite of production.
Category reason: This tests terminology and physiology of blood cell production, which is a core topic within Hematology rather than nursing care decision-making.

Question 50

Patient: 35-year-old female Presentation: Generalized weakness + pallor x2 months, poor appetite, no bleeding history, no fever. Possible Dx:

Accepted Answer

Answer reason: The presentation emphasizes constitutional symptoms (weakness, pallor) with poor appetite and no bleeding history, which makes a nutritional anemia more likely than iron loss from occult hemorrhage. Vitamin B12/folate deficiency can cause symptomatic anemia over weeks to months, often with reduced intake or malabsorption, and does not require fever or bleeding to be present. Hypothyroidism can cause fatigue and pallor but is less directly suggested without classic thyroid features, and chronic kidney disease would typically have additional CKD clues and is less likely at age 35 without other history.
Category reason: This item asks for the most likely diagnosis among anemia and systemic disease options based on symptoms, which is primarily hematologic disease recognition rather than a nursing intervention or prioritization task, fitting Hematology in NursingScience.

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