Question 1

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

Accepted Answer

They return excess interstitial fluid to the venous circulation.

Question 2

A patient receives an injection of antibodies to treat a snake bite. Which type of immunity is this an example of?

Accepted Answer

Artificially induced passive immunity

Question 3

Which lymphatic organ is responsible for the maturation of T cells and the destruction of self-reactive T cells?

Accepted Answer

Thymus

Question 4

Which of the following is NOT a function of the complement system?

Accepted Answer

Stimulating the production of red blood cells

Question 5

A newborn receives antibodies from its mother through breast milk. This is an example of:

Accepted Answer

Naturally acquired passive immunity

Question 6

Which of the following best explains why lymph nodes are strategically located throughout the body?

Accepted Answer

To monitor and filter lymph for pathogens before it returns to the bloodstream

Question 7

During an inflammatory response, which of the following events occurs first?

Accepted Answer

Damaged cells and mast cells release inflammatory mediators

Question 8

Which cell type is primarily responsible for immune surveillance and the destruction of abnormal cells in peripheral tissues?

Accepted Answer

Natural killer (NK) cells

Question 9

A person is exposed to a virus and develops immunity after recovering from the infection. Which type of immunity is this?

Accepted Answer

Naturally acquired active immunity

Question 10

Which of the following best describes the role of interferons in the immune response?

Accepted Answer

They coordinate defenses against viral infections by acting as chemical messengers.

Question 11

Which of the following statements about the major histocompatibility complex (MHC) is correct?

Accepted Answer

Class I MHC molecules present endogenous antigens to cytotoxic T cells.

Question 12

Which of the following is a key difference between innate (nonspecific) and adaptive (specific) immunity?

Accepted Answer

Innate immunity provides a rapid, generalized response to pathogens.

Question 13

A patient with a genetic defect that prevents the formation of perforins would have difficulty with which immune process?

Accepted Answer

Destruction of abnormal cells by NK cells

Question 14

Which of the following best explains why fever can be beneficial during an infection?

Accepted Answer

It increases tissue metabolism and accelerates body defenses.

Question 15

Which of the following is the correct sequence of events in NK cell-mediated destruction of a target cell?

Accepted Answer

Release of perforins → Release of granzymes → Apoptosis of target cell → Phagocytosis by macrophage

Question 16

Which of the following best describes the process of opsonization?

Accepted Answer

The coating of pathogens by antibodies or complement proteins to enhance phagocytosis

Question 17

A patient is given a vaccine containing an inactivated virus. Which type of immunity will this stimulate?

Accepted Answer

Artificially induced active immunity

Question 18

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

Accepted Answer

Filtration of blood and removal of old or damaged red blood cells

Question 19

Which of the following best explains why lymphatic capillaries are highly permeable?

Accepted Answer

They lack a basement membrane and have overlapping endothelial cells that function as one-way valves.

Question 20

Which of the following best describes the role of mast cells in the inflammatory response?

Accepted Answer

They release histamine and other mediators that increase capillary permeability.

The Lymphatic System and Immunity: Structure, Function, and Defense Mechanisms

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