Question 1

Which of the following best describes the primary function of albumin in blood plasma?

Accepted Answer

It prevents water from diffusing out of blood vessels.

Question 2

A patient is diagnosed with polycythemia vera. Which of the following would you expect to find in their blood test results?

Accepted Answer

Abnormally high erythrocyte count

Question 3

Which of the following statements about erythrocytes is TRUE?

Accepted Answer

They lack nuclei and organelles, maximizing space for hemoglobin.

Question 4

A person with sickle cell disease has erythrocytes that:

Accepted Answer

Contain a defective hemoglobin molecule that distorts cell shape under low oxygen.

Question 5

Which of the following is the correct order of abundance for leukocytes in normal human blood, from most to least abundant?

Accepted Answer

Neutrophils, Lymphocytes, Monocytes, Eosinophils, Basophils

Question 6

Which plasma protein is directly involved in the blood clotting process?

Accepted Answer

Fibrinogen

Question 7

A patient is found to have a hematocrit of 60%. Which of the following conditions is most likely present?

Accepted Answer

Polycythemia

Question 8

Which of the following best explains why erythrocytes are biconcave in shape?

Accepted Answer

To increase surface area for gas exchange

Question 9

Which of the following is a function of eosinophils?

Accepted Answer

Digesting and destroying invading parasites

Question 10

During an allergic reaction, which leukocyte is primarily responsible for mediating inflammation by releasing histamines?

Accepted Answer

Basophils

Question 11

Which of the following statements about hematopoiesis is CORRECT?

Accepted Answer

All blood cells originate from a single type of stem cell in the bone marrow.

Question 12

A patient with leukemia is most likely to have which of the following abnormalities?

Accepted Answer

Uncontrolled proliferation of abnormal leukocytes

Question 13

Which of the following best describes the function of platelets (thrombocytes)?

Accepted Answer

They are cell fragments that help initiate blood clotting.

Question 14

Which of the following is a real-world example of the importance of hemoglobin's structure for oxygen transport?

Accepted Answer

People living at high altitudes, such as Tibetans, have adapted with different hemoglobin concentrations to optimize oxygen delivery.

Question 15

Which of the following best explains why mature erythrocytes lack mitochondria?

Accepted Answer

To prevent the consumption of oxygen they are transporting

Question 16

A patient with a genetic defect in fibrinogen production would most likely experience which of the following symptoms?

Accepted Answer

Impaired blood clotting

Question 17

Which of the following best describes the process of diapedesis?

Accepted Answer

The process by which circulating leukocytes leave the capillaries to enter tissues

Question 18

Which of the following is a key difference between granulocytes and agranulocytes?

Accepted Answer

Granulocytes have cytoplasmic granules and lobed nuclei, while agranulocytes do not.

Question 19

Which of the following equations correctly represents the calculation of hematocrit ($H$) as a percentage?

Accepted Answer

$H = \frac{	ext{Volume of RBCs}}{	ext{Total Blood Volume}} 	imes 100$

Question 20

A patient has a total blood volume of $5$ liters and a red blood cell volume of $2.25$ liters. What is their hematocrit percentage?

Accepted Answer

$45\%$

The Cardiovascular System: Blood – Structure, Function, and Composition

Study Guide - Practice Questions