Question 1

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

Accepted Answer

Transporting oxygen to tissues

Question 2

A patient presents with swelling in the lower limbs due to obstruction of lymphatic vessels. Which mechanism is most directly impaired?

Accepted Answer

Collection and return of excess interstitial fluid to the bloodstream

Question 3

Which of the following best describes the structure of a lymphatic vessel?

Accepted Answer

Three layers: endothelial lining (inner), smooth muscle (middle), connective tissue (outer)

Question 4

Which lymphatic organ is responsible for the differentiation of thymocytes into T lymphocytes and secretes thymosins?

Accepted Answer

Thymus

Question 5

A person receives a kidney transplant from a genetically unrelated donor. Which type of transplant is this?

Accepted Answer

Allograft

Question 6

Which of the following is a mechanical barrier and considered the first line of defense against pathogens?

Accepted Answer

Skin and mucous membranes

Question 7

During an inflammatory response, which process attracts phagocytic cells to the site of injury?

Accepted Answer

Chemotaxis

Question 8

Which of the following statements about antigens is TRUE?

Accepted Answer

Antigens are molecules that can elicit an immune response and are often large and complex.

Question 9

Which immunoglobulin is most associated with allergic reactions and decreases with age?

Accepted Answer

IgE

Question 10

A patient develops hives and difficulty breathing within minutes of exposure to peanuts. Which type of allergic reaction is this?

Accepted Answer

Immediate-reaction allergy

Question 11

Which of the following best explains why tissue fluid forms in the interstitial spaces?

Accepted Answer

Filtration from plasma normally exceeds reabsorption, leading to net formation of tissue fluid

Question 12

Which of the following is a function of the spleen?

Accepted Answer

Blood reservoir and removal of damaged red blood cells

Question 13

Which cell type is most active in phagocytosis during an innate immune response?

Accepted Answer

Neutrophils and monocytes

Question 14

Which of the following is TRUE regarding the movement of lymph through lymphatic vessels?

Accepted Answer

It is influenced by skeletal muscle action, respiratory movements, smooth muscle contraction, and valves

Question 15

Which of the following best describes the role of cytokines released by Helper T cells?

Accepted Answer

Stimulate B cells to differentiate and produce antibodies

Question 16

A person is exposed to a pathogen for the first time and develops symptoms after several days. Which immune response is responsible for this initial defense?

Accepted Answer

Primary immune response

Question 17

Which equation best represents the relationship between hydrostatic pressure and movement of fluid into lymphatic capillaries?

Accepted Answer

$$P_{hydrostatic, tissue} \u003e P_{hydrostatic, lymphatic}$$

Question 18

Which of the following is a real-world example of passive immunity?

Accepted Answer

Receiving antibodies through breast milk

Question 19

Which of the following best explains why elderly individuals are at higher risk for infection?

Accepted Answer

Thymus shrinks and antibody response to antigens becomes slower

Lymphatic System and Immunity: Structure and Function

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