$$\text{Hematocrit} = \frac{\text{Volume of RBCs}}{\text{Total blood volume}} \times 100$$

Question 1

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

Accepted Answer

Albumin maintains osmotic pressure, helping regulate fluid balance between blood and tissues.

Question 2

A patient presents with a hematocrit value of 65%. Which of the following is the most likely clinical implication?

Accepted Answer

The patient has polycythemia, increasing blood viscosity and risk of clot formation.

Question 3

Which equation correctly represents the calculation of hematocrit?

Accepted Answer

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

Question 4

During an incompatible blood transfusion, what is the most likely outcome?

Accepted Answer

The recipient's antibodies attack donor antigens, causing agglutination and hemolysis.

Question 5

Which of the following white blood cells is primarily responsible for adaptive immune responses?

Accepted Answer

Lymphocytes

Question 6

A newborn is at risk for hemolytic disease due to Rh incompatibility. Which scenario best explains this risk?

Accepted Answer

Mother is Rh negative, fetus is Rh positive, and mother has developed anti-Rh antibodies.

Question 7

Which plasma protein is most directly involved in blood clot formation?

Accepted Answer

Fibrinogen

Question 8

What is the primary reason red blood cells lack a nucleus?

Accepted Answer

To allow for increased flexibility and maximize space for hemoglobin.

Question 9

Which of the following best describes the process of diapedesis?

Accepted Answer

Leukocytes squeeze through capillary walls to enter tissues.

Question 10

A patient with iron-deficiency anemia is likely to have which of the following symptoms?

Accepted Answer

Decreased oxygen-carrying capacity, leading to fatigue.

Question 11

Which of the following is the correct sequence of events in hemostasis?

Accepted Answer

Vascular spasm → Platelet plug formation → Coagulation

Question 12

Which blood type is considered the universal donor, and why?

Accepted Answer

Type O, because it lacks A and B antigens.

Question 13

Which equation best represents the relationship between blood viscosity and hematocrit?

Accepted Answer

$$	ext{Blood viscosity} \propto 	ext{Hematocrit}$$

Question 14

Which of the following is a key difference between plasma and serum?

Accepted Answer

Plasma contains clotting factors, while serum does not.

Question 15

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

Accepted Answer

Abnormal proliferation of leukocytes, impairing normal blood function.

Question 16

Which of the following best explains why calcium ions ($$	ext{Ca}^{2+}) $$are essential in the coagulation process?

Accepted Answer

Calcium ions are required for several steps in the activation of clotting factors.

Question 17

Which of the following white blood cells is classified as a granulocyte and is primarily involved in phagocytosis?

Accepted Answer

Neutrophil

Question 18

If plasma protein levels drop significantly, what is the most likely physiological consequence?

Accepted Answer

Decreased osmotic pressure, resulting in tissue edema.

Question 19

Which of the following best describes the role of platelets in hemostasis?

Accepted Answer

Platelets form a temporary plug at the site of vessel injury and release chemicals to promote coagulation.

Question 20

Which of the following conditions stimulates increased erythrocyte production (erythropoiesis)?

Accepted Answer

Low oxygen levels in tissues (hypoxia)

Blood: Structure, Function, and Clinical Significance

Study Guide - Practice Questions