Question 1

Which of the following best describes the primary function of lymph nodes in the lymphatic system?

Accepted Answer

They filter lymph and trap pathogens, facilitating immune responses.

Question 2

A patient presents with swelling in the lower limbs due to lymph accumulation. Which of the following is the most likely cause of this condition?

Accepted Answer

Obstruction of lymphatic vessels leading to lymphedema.

Question 3

Which of the following is NOT a component of the lymphatic system?

Accepted Answer

Liver

Question 4

Which equation correctly represents the relationship between hydrostatic pressure ($$P_{h}$$), osmotic pressure ($$P_{o}$$), and net filtration pressure ($$NFP) in $$lymph formation?

Accepted Answer

$$NFP = P_{h} - P_{o}$$

Question 5

Which of the following cells is primarily responsible for antibody production in the immune response?

Accepted Answer

B lymphocytes (plasma cells)

Question 6

A child receives a vaccine for measles. Which type of immunity is being developed?

Accepted Answer

Active artificial immunity

Question 7

Which of the following best explains the role of the complement system in immunity?

Accepted Answer

It enhances phagocytosis and causes lysis of pathogens.

Question 8

Which of the following is a correct sequence of the three lines of defense against pathogens in the body?

Accepted Answer

Physical barriers, innate immunity, adaptive immunity

Question 9

A patient with HIV is at increased risk for infections due to the destruction of which type of immune cell?

Accepted Answer

Helper T cells (CD4+)

Question 10

Which of the following best describes the function of Peyer's patches?

Accepted Answer

They monitor intestinal bacteria and prevent the growth of pathogenic bacteria in the intestines.

Question 11

Which of the following is a function of the spleen in the lymphatic system?

Accepted Answer

Destruction of old red blood cells and activation of lymphocytes.

Question 12

Which of the following best describes the difference between lymphatic vessels and blood vessels?

Accepted Answer

Lymphatic vessels carry lymph and have valves to prevent backflow, while blood vessels carry blood and may not have valves.

Question 13

Which of the following is a chemical mediator released during inflammation that causes vasodilation and increased permeability of blood vessels?

Accepted Answer

Histamine

Question 14

Which equation correctly represents the calculation of antibody concentration ($$C_{Ab}) in $$plasma given the total antibody mass ($$M_{Ab}) $$and plasma volume ($$V_{plasma}$$)?

Accepted Answer

$$C_{Ab} = \frac{M_{Ab}}{V_{plasma}}$$

Question 15

Which of the following best describes the role of cytotoxic T cells in the immune response?

Accepted Answer

They directly kill infected or cancerous cells.

Question 16

A patient receives an injection of immunoglobulins after exposure to hepatitis. What type of immunity is this?

Accepted Answer

Passive artificial immunity

Question 17

Which of the following is a correct statement about the function of the thymus?

Accepted Answer

It is the site of T cell maturation.

Question 18

Which of the following best explains the difference between primary and secondary immune responses?

Accepted Answer

Secondary response is faster and stronger due to memory cells.

Question 19

Which of the following is a function of secreted antibodies?

Accepted Answer

They bind to antigens and neutralize pathogens.

Question 20

Which of the following best describes the process of antigen presentation by MHC Class II molecules?

Accepted Answer

MHC Class II molecules present antigens to helper T cells.

Chapter 20 – The Lymphatic System and Immunity: Structured Study Guide

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