Q: Which of the following equations correctly represents the calculation of hematocrit ($$Hct) $$given packed cell volume ($$PCV) $$and total blood volume ($$TBV$$)?

$$Hct = \frac{PCV}{TBV} \times 100$$

Question 1

Which of the following best describes the primary function of erythrocytes in the cardiovascular system?

Accepted Answer

To transport oxygen from the lungs to body tissues and carbon dioxide from tissues to the lungs

Question 2

A patient presents with fatigue, pallor, and shortness of breath. Laboratory results show low hemoglobin and low hematocrit. Further testing reveals a deficiency in intrinsic factor. Which type of anemia is most likely?

Accepted Answer

Pernicious anemia

Question 3

Which of the following equations correctly represents the calculation of hematocrit ($$Hct) $$given packed cell volume ($$PCV) $$and total blood volume ($$TBV$$)?

Accepted Answer

$$Hct = \frac{PCV}{TBV} 	imes 100$$

Question 4

Which plasma protein is most responsible for maintaining osmotic pressure and transporting substances such as hormones and drugs?

Accepted Answer

Albumin

Question 5

A patient with a genetic mutation resulting in abnormal hemoglobin that causes red blood cells to become crescent-shaped under low oxygen conditions is most likely suffering from which disorder?

Accepted Answer

Sickle cell anemia

Question 6

Which of the following best describes the process of erythropoiesis?

Accepted Answer

The formation of red blood cells from hematopoietic stem cells in the red bone marrow

Question 7

A patient with a total white blood cell count of 18,000/μL (normal: 4,000–11,000/μL) is most likely experiencing which condition?

Accepted Answer

Leukocytosis

Question 8

Which of the following steps occurs first during hemostasis after a blood vessel is injured?

Accepted Answer

Vascular spasm

Question 9

A patient with blood type B- receives a transfusion of AB+ blood. Which of the following is the most likely outcome?

Accepted Answer

Agglutination and hemolysis due to anti-A and anti-Rh antibodies

Question 10

Which of the following best explains why vitamin K deficiency can lead to excessive bleeding?

Accepted Answer

Vitamin K is required for the synthesis of several clotting factors in the liver

Question 11

Which leukocyte is most abundant in normal blood and is primarily responsible for phagocytosis of bacteria?

Accepted Answer

Neutrophil

Question 12

A newborn develops severe jaundice and anemia shortly after birth. The mother is Rh- and the baby is Rh+. Which condition best explains these findings?

Accepted Answer

Erythroblastosis fetalis (hemolytic disease of the newborn)

Question 13

Which of the following endogenous mechanisms helps prevent the formation of undesirable clots in intact blood vessels?

Accepted Answer

Smooth endothelial lining and secretion of prostacyclin

Question 14

Which of the following best describes the difference between granulocytes and agranulocytes?

Accepted Answer

Granulocytes contain visible cytoplasmic granules; agranulocytes do not

Question 15

Which of the following equations correctly represents the calculation of blood pH if the concentration of bicarbonate ($$[$$HCO_3$$^-]) is 24 $$mEq/L and the concentration of carbonic acid ($$[H_2CO_3]) is 1.2 $$mEq/L? (Use the Henderson-Hasselbalch equation: $$pH = 6.1 + \log_{10} \left( \frac{[$$HCO_3$$^-]}{[H_2CO_3]} \right))$$

Accepted Answer

$$pH = 6.1 + \log_{10} \left( \frac{24}{1.2} \right)$$

Question 16

A patient is diagnosed with thrombocytopenia. Which of the following findings would you expect?

Accepted Answer

Increased risk of excessive bleeding due to low platelet count

Question 17

Which of the following best describes the fate of heme after erythrocyte destruction?

Accepted Answer

It is converted to bilirubin and transported to the liver for excretion

Question 18

Which of the following scenarios would most likely result in disseminated intravascular coagulation (DIC)?

Accepted Answer

Severe trauma or widespread infection leading to systemic activation of clotting

Question 19

Which of the following statements about agglutinogens and agglutinins is correct?

Accepted Answer

Agglutinogens are antigens on red blood cells; agglutinins are antibodies in plasma

Question 20

A patient with polycythemia vera is most likely to experience which of the following complications?

Accepted Answer

Increased blood viscosity and risk of thrombosis

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