Question 1

Which of the following best describes the primary function of erythrocytes in the human body?

Accepted Answer

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

Question 2

Hemoglobin can carry up to four oxygen molecules. Which structural feature of hemoglobin allows this?

Accepted Answer

Four heme groups, each with an iron atom that binds one oxygen molecule

Question 3

A patient with blood type O is considered a universal donor. Why?

Accepted Answer

Type O blood lacks antigens on the surface of its red blood cells

Question 4

Which of the following is TRUE regarding the process of agglutination?

Accepted Answer

Agglutination occurs when antibodies bind to antigens on red blood cells, causing them to stick together

Question 5

Which leukocyte is primarily responsible for attacking large parasites that are too big to be phagocytized?

Accepted Answer

Eosinophils

Question 6

During hemostasis, which stage involves the formation of a platelet plug?

Accepted Answer

Platelet plug formation

Question 7

Which layer of a blood vessel wall is responsible for vasoconstriction and vasodilation?

Accepted Answer

Tunica media

Question 8

A patient stands up quickly and feels dizzy. Which mechanism helps restore blood pressure to the brain?

Accepted Answer

Baroreceptors detect the drop in blood pressure and the medulla oblongata signals blood vessels to constrict

Question 9

Which equation best represents the relationship between blood flow ($$F$$), pressure difference ($$\Delta P$$), and resistance ($$R$$)?

Accepted Answer

$$F = \frac{\Delta P}{R}$$

Question 10

Which hormone is a potent vasoconstrictor and is often targeted by ACE inhibitors to treat hypertension?

Accepted Answer

Angiotensin II

Question 11

Which of the following is a function of the lymphatic system that directly supports immunity?

Accepted Answer

Checking recovered fluid for toxins and pathogens

Question 12

Which cell type is responsible for the 'kiss of death' mechanism, releasing perforins to destroy infected cells?

Accepted Answer

Natural killer cells

Question 13

Which process is initiated by basophils releasing histamine, resulting in increased blood flow and swelling?

Accepted Answer

Inflammation

Question 14

Which of the following best describes the difference between innate and adaptive immunity?

Accepted Answer

Innate immunity is non-specific and lacks memory, while adaptive immunity is specific and has memory

Question 15

Which of the following is TRUE about the role of antigen-presenting cells (APCs) in adaptive immunity?

Accepted Answer

APCs process and present antigens to T cells, enabling recognition

Question 16

During humoral immunity, what is the primary function of plasma cells?

Accepted Answer

To secrete antibodies that bind to specific antigens

Question 17

Which equation best represents the relationship between resistance ($$R$$), vessel radius ($$r$$), and flow ($$F$$)?

Accepted Answer

$$R \propto \frac{1}{r^4$}$$

Question 18

Which of the following is an example of passive immunity?

Accepted Answer

Receiving antibodies from the mother while in utero

Question 19

Which blood vessel type is most important for exchange of nutrients, wastes, and hormones with tissues?

Accepted Answer

Capillaries

Question 20

A patient with high blood viscosity is likely to experience which of the following?

Accepted Answer

Increased peripheral resistance and decreased blood flow

Blood, Cardiovascular, Lymphatic, and Immune Systems: ANP College Study Notes

Study Guide - Practice Questions