Question 1

Which of the following best describes the primary function of lymph nodes in the lymphatic system?

Accepted Answer

They filter lymph and trap pathogens, facilitating immune responses.

Question 2

If the lymphatic vessels are blocked, which of the following is the most likely consequence?

Accepted Answer

Edema in the affected tissues due to accumulation of interstitial fluid.

Question 3

What is the role of MALT (Mucosa-Associated Lymphoid Tissue) in the immune system?

Accepted Answer

It provides localized immune protection at mucosal surfaces.

Question 4

Why is it important for lymph to be filtered before returning to the bloodstream?

Accepted Answer

To eliminate pathogens and debris, preventing infection.

Question 5

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

Accepted Answer

Antibodies

Question 6

A patient is exposed to a virus and produces antibodies against it. Which type of immunity is this?

Accepted Answer

Natural active immunity

Question 7

Which leukocyte is primarily responsible for producing antibodies?

Accepted Answer

B lymphocytes (plasma cells)

Question 8

Which of the following best describes the function of complement proteins in immunity?

Accepted Answer

They form pores in pathogen membranes, leading to cell lysis.

Question 9

Which cell type presents antigens to T cells, initiating the adaptive immune response?

Accepted Answer

Dendritic cells

Question 10

During inflammation, which cytokine is most commonly associated with fever induction?

Accepted Answer

Interleukin-1 (IL-1)

Question 11

Which equation best represents the relationship between antibody concentration ($$[Ab]) $$and antigen binding sites ($$n) in a $$solution?

Accepted Answer

$$[Ab] = n \cdot [Ag]$$

Question 12

Which of the following is a correct statement about the difference between Tc (cytotoxic T) cells and Th (helper T) cells?

Accepted Answer

Th cells activate other immune cells, while Tc cells destroy infected cells.

Question 13

A newborn receives antibodies from its mother through breast milk. What type of immunity is this?

Accepted Answer

Natural passive immunity

Question 14

Which of the following best describes the role of MHC class I molecules?

Accepted Answer

They present endogenous antigens to cytotoxic T cells.

Question 15

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

Accepted Answer

Contraction of surrounding skeletal muscles and valves preventing backflow

Question 16

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

Accepted Answer

Vasodilation, increased permeability, leukocyte migration

Question 17

Which equation best represents the calculation of filtration pressure ($$P_f) in a $$lymph node, given hydrostatic pressure ($$P_h) $$and osmotic pressure ($$P_o$$)?

Accepted Answer

$$P_f = P_h - P_o$$

Question 18

Which of the following is a function of interferons in the immune response?

Accepted Answer

They inhibit viral replication and activate immune cells.

Question 19

A patient receives an injection of antibodies after exposure to rabies. What type of immunity is this?

Accepted Answer

Artificial passive immunity

Question 20

Which of the following best describes the relationship between T cells and antigen-presenting cells (APCs)?

Accepted Answer

APCs present processed antigens to T cells, activating them.

Lymphatic and Immune System: Study Guide (BIOL 2402, Chapter 21)

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