Question 1

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

Accepted Answer

Transporting oxygen to tissues

Question 2

Lymphatic capillaries differ from blood capillaries in that they:

Accepted Answer

Are blind-ended, allowing one-way flow of lymph

Question 3

Which of the following best describes the role of the thymus in immunity?

Accepted Answer

It is the site of T cell maturation and selection

Question 4

A patient has swelling in her right arm after lymph node removal due to breast cancer. What is the most likely cause?

Accepted Answer

Impaired lymphatic drainage leading to lymphedema

Question 5

Which cell type is primarily responsible for phagocytosis in lymphoid tissues?

Accepted Answer

Macrophages

Question 6

Which of the following is a function of MALT (mucosa-associated lymphatic tissue)?

Accepted Answer

Protects mucosal surfaces from pathogens

Question 7

Which of the following is TRUE regarding lymph nodes?

Accepted Answer

They filter lymph and provide sites for immune cell activation

Question 8

Which organ is responsible for filtering blood, removing old erythrocytes, and mounting immune responses?

Accepted Answer

Spleen

Question 9

Which of the following is a first line of defense against pathogens?

Accepted Answer

Intact skin and mucous membranes

Question 10

A virus infects a cell and triggers the production of interferons. What is the primary function of interferons?

Accepted Answer

Inhibit viral replication inside host cells

Question 11

Which of the following best describes the process of diapedesis?

Accepted Answer

Leukocytes squeeze through capillary walls to reach infected tissues

Question 12

Which chemical is responsible for inducing fever during an immune response?

Accepted Answer

Pyrogens

Question 13

Cell-mediated immunity primarily targets which of the following?

Accepted Answer

Intracellular pathogens and cancer cells

Question 14

Which of the following statements about antigens is correct?

Accepted Answer

Haptens are only immunogenic when attached to a protein carrier

Question 15

What is the role of activated helper T cells in the immune response?

Accepted Answer

They stimulate B cells and cytotoxic T cells

Question 16

Which immunoglobulin class is most abundant in plasma and provides the majority of antibody-based immunity?

Accepted Answer

IgG

Question 17

Which of the following equations correctly represents the relationship between fluid movement and pressure in lymphatic capillaries?

Accepted Answer

$$ \Delta P = P_{blood} - P_{interstitial} $$

Question 18

During a secondary immune response, which of the following occurs?

Accepted Answer

Memory cells respond rapidly and produce more antibodies

Question 19

Which of the following is an example of passive immunity?

Accepted Answer

Receiving antibodies through breast milk

Question 20

A patient with HIV is at increased risk for infections because the virus targets which immune cell?

Accepted Answer

Helper T cells (CD4+)

The Lymphatic System and Immunity: Structure, Function, and Clinical Relevance

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