Question 1

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

Accepted Answer

They are lymphatic nodules located in the small intestine that monitor intestinal bacteria and prevent the growth of pathogenic bacteria.

Question 2

Which of the following is NOT a function of the spleen?

Accepted Answer

Maturing T lymphocytes

Question 3

A patient has a blockage in their right lymphatic duct. Which area of the body would most likely experience lymphatic fluid buildup as a result?

Accepted Answer

Right arm

Question 4

Which of the following best describes the pathway of lymph from the lymphatic capillaries back to the cardiovascular system?

Accepted Answer

Lymphatic capillaries → lymphatic vessels → lymph nodes → lymphatic trunks → collecting ducts → subclavian veins

Question 5

Which of the following is a primary function of the thymus?

Accepted Answer

Maturation of T lymphocytes

Question 6

Which of the following lymphatic tissues is classified as MALT (Mucosa-Associated Lymphoid Tissue)?

Accepted Answer

Tonsils

Question 7

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

Accepted Answer

Production of hormones for metabolism

Question 8

Which of the following best describes the difference between active and passive immunity?

Accepted Answer

Active immunity is acquired through direct exposure to an antigen, while passive immunity is acquired by receiving antibodies from another source.

Question 9

A patient receives an injection of antibodies after exposure to a toxin. This is an example of:

Accepted Answer

Artificially acquired passive immunity

Question 10

Which of the following best describes the function of plasma cells?

Accepted Answer

They produce and secrete antibodies.

Question 11

Which of the following is the correct sequence of events during the classical pathway of complement activation?

Accepted Answer

Antigen-antibody complex formation → activation of C1 → cascade activation of C2, C4, and C3 → formation of membrane attack complex

Question 12

Which of the following best describes the function of the membrane attack complex (MAC) in the immune response?

Accepted Answer

It forms pores in the pathogen's membrane, leading to cell lysis.

Question 13

Which of the following is a function of regulatory T cells?

Accepted Answer

They suppress immune responses to prevent autoimmunity.

Question 14

Which of the following best describes the process of opsonization?

Accepted Answer

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

Question 15

Which of the following cells are part of the innate immune system and are responsible for killing virus-infected cells and tumor cells?

Accepted Answer

Natural killer (NK) cells

Question 16

Which of the following events occurs first during the inflammatory response?

Accepted Answer

Vasodilation and increased vascular permeability

Question 17

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

Accepted Answer

The secondary response is faster and produces more antibodies due to memory cells.

Question 18

Which of the following best describes the role of CD8+ T cells?

Accepted Answer

They directly kill infected or cancerous cells.

Question 19

Which class of MHC molecules is present on all nucleated cells and presents endogenous antigens to cytotoxic T cells?

Accepted Answer

MHC class I

Question 20

A patient is unable to produce sufficient antibodies after vaccination. Which cell type is most likely deficient?

Accepted Answer

Plasma cells

Lymphatic and Immune Systems: Key Concepts and Functions

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