Question 1

Which of the following best describes the primary function of the lymphatic system?

Accepted Answer

Return interstitial fluid to the bloodstream and provide immune defense

Question 2

Lymph is composed of all the following EXCEPT:

Accepted Answer

Red blood cells

Question 3

Arrange the following lymphatic vessels in order from smallest to largest:

Accepted Answer

Capillary → Vessel → Trunk → Duct

Question 4

Which mechanism is primarily responsible for the movement of lymph through lymphatic vessels?

Accepted Answer

Contraction of skeletal muscles and pressure changes during breathing

Question 5

The thoracic duct drains lymph from which of the following regions?

Accepted Answer

Left side of head, left upper limb, and both lower limbs

Question 6

Which cell type is most abundant in the germinal centers of lymph nodes?

Accepted Answer

B lymphocytes

Question 7

Peyer's patches are primarily found in which region of the gastrointestinal tract?

Accepted Answer

Ileum

Question 8

Which of the following best describes the function of the thymus?

Accepted Answer

Site of T cell maturation and immunocompetence

Question 9

Which of the following is a function of the spleen?

Accepted Answer

Destruction of old red blood cells and immune surveillance

Question 10

Burkitt’s lymphoma is most closely associated with which of the following?

Accepted Answer

Epstein-Barr virus infection

Question 11

Toll-like receptors (TLRs) play a critical role in which aspect of immunity?

Accepted Answer

Detecting pathogen-associated molecular patterns (PAMPs) and initiating innate immune responses

Question 12

Which of the following is NOT a characteristic of antibodies?

Accepted Answer

They directly destroy pathogens by phagocytosis

Question 13

Natural Killer (NK) cells are unique because they:

Accepted Answer

Destroy cells lacking MHC class I molecules

Question 14

Passive immunity can be achieved by:

Accepted Answer

Receiving antibodies from another individual

Question 15

Which type of T cell is primarily responsible for directly killing infected cells?

Accepted Answer

Cytotoxic T cell

Question 16

Clonal selection of B lymphocytes occurs when:

Accepted Answer

A B cell encounters its specific antigen and proliferates

Question 17

The variable region of an antibody is responsible for:

Accepted Answer

Binding to specific antigens

Question 18

A hapten is best defined as:

Accepted Answer

A small molecule that is antigenic only when attached to a larger carrier

Question 19

Chemotaxis refers to:

Accepted Answer

The movement of immune cells toward higher concentrations of chemical signals

Question 20

Which of the following is the correct sequence of events in phagocytosis?

Accepted Answer

Adherence → Ingestion → Digestion → Exocytosis

Lymphatic System and Immune System: High-Yield Study Guide (Chapters 20 & 21)

Study Guide - Practice Questions