Question 1

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

Accepted Answer

They return leaked fluid and proteins from the interstitial space back to the bloodstream.

Question 2

A patient suffers a traumatic injury that requires removal of the spleen. Which of the following is a likely consequence?

Accepted Answer

The patient will have increased susceptibility to bloodborne infections.

Question 3

Which of the following mechanisms does NOT contribute to the movement of lymph through lymphatic vessels?

Accepted Answer

Active pumping by smooth muscle in lymph nodes

Question 4

Which cell type is responsible for producing the stroma that supports other cells in lymphoid tissue?

Accepted Answer

Reticular cells

Question 5

A child is born with a congenital absence of T cells but normal B cell function. Which organ is most likely defective?

Accepted Answer

Thymus

Question 6

Which of the following best explains why lymph nodes have more afferent than efferent lymphatic vessels?

Accepted Answer

To allow lymphocytes and macrophages more time to filter and respond to pathogens

Question 7

Which of the following is a function of MALT (mucosa-associated lymphoid tissue)?

Accepted Answer

Guarding mucosal entryways against pathogens

Question 8

Which of the following is TRUE regarding the thymus?

Accepted Answer

It is the site where T lymphocytes become immunocompetent.

Question 9

Which of the following is NOT a characteristic of the innate immune system?

Accepted Answer

It has memory for specific pathogens.

Question 10

A patient with a genetic defect in complement proteins would most likely experience which of the following?

Accepted Answer

Impaired ability to lyse foreign cells and clear infections

Question 11

Which of the following best describes the process of clonal selection in adaptive immunity?

Accepted Answer

A single lymphocyte divides and differentiates after binding its specific antigen.

Question 12

Which of the following is a correct pairing of antibody class and function?

Accepted Answer

IgA – found in secretions such as saliva and tears

Question 13

Which of the following is required for the activation of cytotoxic T cells?

Accepted Answer

Antigen presentation on class I MHC proteins

Question 14

A person receives an injection of preformed antibodies after a snake bite. This is an example of:

Accepted Answer

Artificially acquired passive immunity

Question 15

Which of the following best explains why autoimmune diseases occur?

Accepted Answer

The immune system fails to recognize self-antigens and attacks the body's own tissues.

Question 16

Which of the following is a key difference between humoral and cellular immunity?

Accepted Answer

Cellular immunity is mediated by T lymphocytes, while humoral immunity is mediated by antibodies produced by B lymphocytes.

Question 17

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

Accepted Answer

They activate B cells, other T cells, and macrophages by releasing cytokines.

Question 18

A patient develops a fever after a bacterial infection. Which of the following best explains the physiological benefit of fever?

Accepted Answer

Fever enhances the activity of immune cells and inhibits the growth of some pathogens.

Question 19

Which of the following is a correct sequence of events during the inflammatory response?

Accepted Answer

Vasodilation, increased capillary permeability, leukocyte migration, tissue repair

Question 20

Which of the following best describes the role of antigen-presenting cells (APCs) in adaptive immunity?

Accepted Answer

APCs engulf antigens and present fragments on their surface to activate T cells.

The Lymphatic System and Immune System: Structure, Function, and Body Defenses

Study Guide - Practice Questions