Question 1

Which of the following best describes the primary function of lymphatic capillaries in the tissue spaces?

Accepted Answer

They absorb and return excess interstitial fluid and proteins to the bloodstream.

Question 2

A patient presents with severe swelling of the lower limb, as shown in the third image. Which of the following is the most likely cause of this condition?

Accepted Answer

Blockage of lymphatic vessels leading to lymphedema

Question 3

Which lymphatic duct is responsible for draining lymph from the right upper extremity and right side of the head, neck, and upper torso?

Accepted Answer

Right lymphatic duct

Question 4

What is the primary function of the lymph nodes as illustrated in the sixth image?

Accepted Answer

To filter lymph and trap bacteria and other foreign particles

Question 5

A patient develops red streaks radiating from a wound, as shown in the fourth image. What is the most likely diagnosis?

Accepted Answer

Lymphangitis

Question 6

Which of the following statements about the thoracic duct is correct?

Accepted Answer

It is the largest lymphatic vessel and drains lymph from about three-fourths of the body.

Question 7

Which structure in the lymphatic system is responsible for the absorption and transport of fats from the digestive tract?

Accepted Answer

Lacteals

Question 8

A patient undergoes a mastectomy with removal of regional lymph nodes. What is a potential complication of this procedure?

Accepted Answer

Increased risk of lymphedema in the affected arm

Question 9

Which of the following best explains the process of metastasis in cancer as it relates to the lymphatic system?

Accepted Answer

Cancer cells can enter lymphatic vessels and travel to distant sites via lymphatic drainage.

Question 10

Which of the following is a function of the spleen?

Accepted Answer

Phagocytosis of bacteria and old red blood cells

Question 11

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

Accepted Answer

It produces T lymphocytes and secretes thymosins to influence T-cell development.

Question 12

Which of the following is a correct statement about the tonsils?

Accepted Answer

They form a protective ring of lymphoid tissue around the openings of the mouth and throat.

Question 13

Which of the following best describes the difference between innate and adaptive immunity?

Accepted Answer

Innate immunity is nonspecific and rapid, while adaptive immunity is specific and has memory.

Question 14

Which of the following is an example of artificial passive immunity?

Accepted Answer

Receiving antibodies from another individual via injection

Question 15

What is the primary function of complement proteins in the immune response?

Accepted Answer

To form protein rings that create holes in foreign cell membranes, leading to cell lysis

Question 16

Which of the following best describes the function of plasma cells?

Accepted Answer

They secrete antibodies into the blood.

Question 17

A patient with a genetic defect in stem cell development before birth is most likely to develop which of the following conditions?

Accepted Answer

Severe combined immune deficiency (SCID)

Question 18

Which of the following best explains the mechanism of an immediate allergic response?

Accepted Answer

It is mediated by humoral (antibody-mediated) immunity.

Question 19

Which of the following is a characteristic of autoimmunity?

Accepted Answer

The immune system attacks the body's own tissues.

Question 20

Which of the following best describes the process of phagocytosis?

Accepted Answer

The ingestion and destruction of foreign cells or particles by immune cells

Lymphatic System and Immunity: Structure, Function, and Clinical Significance

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