Question 1

Which of the following best describes the three major constituents of blood?

Accepted Answer

Red blood cells, white blood cells, and plasma

Question 2

A patient presents with fatigue, pallor, and shortness of breath. Laboratory tests reveal a low hematocrit. Which condition is most likely responsible for these symptoms?

Accepted Answer

Anemia

Question 3

Which plasma protein is primarily responsible for maintaining osmotic pressure in the blood?

Accepted Answer

Albumin

Question 4

Which hormone stimulates the production of red blood cells in the bone marrow?

Accepted Answer

Erythropoietin

Question 5

A blood sample is analyzed and found to have a hematocrit of 40%. What does this value represent?

Accepted Answer

The percentage of blood volume occupied by red blood cells

Question 6

Which of the following is the correct sequence of the three steps of hemostasis?

Accepted Answer

Vascular spasm, platelet plug formation, coagulation

Question 7

Which of the following best describes how red blood cells carry oxygen?

Accepted Answer

Oxygen binds to the iron in hemoglobin molecules within red blood cells

Question 8

Which of the following is NOT one of the five major types of white blood cells?

Accepted Answer

Erythrocyte

Question 9

A patient has a genetic defect that prevents the conversion of fibrinogen to fibrin. Which step of hemostasis is most directly affected?

Accepted Answer

Coagulation

Question 10

Which of the following best describes the role of thrombopoietin?

Accepted Answer

It stimulates the production of platelets from megakaryocytes

Question 11

A patient with a low white blood cell count is most likely to experience which of the following?

Accepted Answer

Increased susceptibility to infections

Question 12

Which of the following best describes the process of hematopoiesis?

Accepted Answer

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

Question 13

Which of the following is a function of transferrin in the blood?

Accepted Answer

Transporting iron in the plasma

Question 14

A patient develops a thrombus in a coronary artery. What is the most likely consequence?

Accepted Answer

Reduced blood flow to the heart muscle, potentially causing a heart attack

Question 15

Which of the following best describes the transformation of a platelet plug into a blood clot?

Accepted Answer

Fibrin strands are formed, stabilizing the platelet plug

Question 16

Which of the following equations correctly represents the calculation of hematocrit?

Accepted Answer

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

Question 17

Which of the following best describes the function of globulins in plasma?

Accepted Answer

They function as antibodies and transport proteins

Question 18

A patient with liver disease has decreased production of fibrinogen. What is the most likely effect?

Accepted Answer

Impaired blood clotting

Question 19

Which of the following best describes the role of thrombin in coagulation?

Accepted Answer

It converts fibrinogen to fibrin

Question 20

A patient is exposed to high altitude, resulting in decreased oxygen availability. Which hormone will increase to stimulate red blood cell production, and what is the physiological benefit?

Accepted Answer

Erythropoietin; increased oxygen-carrying capacity

Anatomy & Physiology: Blood – Key Concepts and Study Guidance

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