Question 1

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

Accepted Answer

Maintaining normal blood volume and composition of interstitial fluid

Question 2

Which structure prevents the backflow of lymph in small to medium-sized lymphatic vessels?

Accepted Answer

Valves located close together

Question 3

A patient presents with swelling in the lower limbs due to blocked lymphatic drainage. What is the most likely diagnosis?

Accepted Answer

Lymphedema

Question 4

Which of the following is a primary lymphoid organ where T cells mature?

Accepted Answer

Thymus

Question 5

Which class of lymphocyte is primarily responsible for antibody-mediated (humoral) immunity?

Accepted Answer

B cells

Question 6

What is the main function of the spleen?

Accepted Answer

Filtering blood and removing abnormal blood cells

Question 7

Which of the following best describes the role of interferons in innate immunity?

Accepted Answer

They trigger production of antiviral proteins in nearby cells

Question 8

A child receives a vaccine containing inactivated pathogens. What type of immunity is being developed?

Accepted Answer

Artificially induced active immunity

Question 9

Which antibody class is most abundant in blood and responsible for resistance against many viruses and bacteria?

Accepted Answer

IgG

Question 10

Which process describes the coating of a pathogen with antibodies to enhance phagocytosis?

Accepted Answer

Opsonization

Question 11

A patient with multiple sclerosis produces antibodies against myelin sheaths. This is an example of:

Accepted Answer

Autoimmune disorder

Question 12

Which of the following is a property of adaptive immunity that allows for a faster and stronger response upon second exposure to an antigen?

Accepted Answer

Memory

Question 13

Which cells are responsible for immune surveillance and destruction of abnormal cells, including cancer cells?

Accepted Answer

Natural killer (NK) cells

Question 14

Which pathway of complement activation is most rapid and effective, involving complement proteins attaching to antibodies bound to pathogens?

Accepted Answer

Classical pathway

Question 15

Which of the following best describes the effect of pyrogens on the body?

Accepted Answer

They reset the hypothalamic thermostat, raising body temperature

Question 16

A patient receives antibodies to treat a snake bite. What type of immunity is this?

Accepted Answer

Artificially induced passive immunity

Question 17

Which of the following is a function of the red pulp in the spleen?

Accepted Answer

Removal of abnormal red blood cells by macrophages

Question 18

Which of the following best explains why elderly individuals are more susceptible to infections and cancer?

Accepted Answer

Decreased thymic hormone levels and reduced immune surveillance

Question 19

Which of the following is a correct sequence for the path of lymph through a lymph node?

Accepted Answer

Afferent lymphatics → subcapsular space → outer cortex → paracortex → medullary sinus → efferent lymphatics

Question 20

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

Accepted Answer

They stimulate activation and function of T cells and B cells

The Lymphatic System and Immunity – Study Notes

Study Guide - Practice Questions