Question 1

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

Accepted Answer

Producing red blood cells in adults

Question 2

A patient presents with swelling in their lower limbs due to excess interstitial fluid. Which of the following best explains the physiological basis for this edema?

Accepted Answer

More fluid leaves blood capillaries than is returned, overwhelming lymphatic drainage

Question 3

Which lymphatic vessel is responsible for draining lymph from the right side of the head, neck, chest, and arm?

Accepted Answer

Right lymphatic duct

Question 4

What structural feature of lymphatic capillaries allows them to absorb large molecules and excess fluid from tissues?

Accepted Answer

Blind-ended structure with overlapping endothelial cells

Question 5

Which mechanism is primarily responsible for the movement of lymph toward the heart?

Accepted Answer

Skeletal muscle contraction and respiratory pump

Question 6

A blockage in the thoracic duct would most likely result in which of the following?

Accepted Answer

Edema in the left leg and abdomen

Question 7

Which of the following statements about lymph nodes is TRUE?

Accepted Answer

They are encapsulated structures that filter lymph and contain immune cells

Question 8

What is the main difference between lymph nodes and lymph nodules?

Accepted Answer

Lymph nodes have a capsule; lymph nodules do not

Question 9

Which of the following best describes the function of the white pulp in the spleen?

Accepted Answer

It contains lymphatic tissue with T and B cells for immune responses

Question 10

A patient has a splenectomy (removal of the spleen). Which of the following consequences is most likely?

Accepted Answer

Decreased ability to filter blood-borne pathogens

Question 11

Which of the following equations best represents the net filtration pressure ($$NFP) $$that drives bulk flow across capillary walls?

Accepted Answer

$$NFP = (P_c - P_{if}) - (\pi_c - \pi_{if})$$

Question 12

Which of the following best explains why lymphatic capillaries are important in preventing edema?

Accepted Answer

They return excess interstitial fluid to the bloodstream

Question 13

If the valves in lymphatic vessels become incompetent, which of the following is the most likely consequence?

Accepted Answer

Backflow of lymph and potential tissue swelling

Question 14

Which of the following is a primary lymphatic organ and what is its main function?

Accepted Answer

Thymus; maturation of T lymphocytes

Question 15

During vigorous exercise, lymph flow increases. Which physiological mechanism is most responsible for this increase?

Accepted Answer

Enhanced skeletal muscle contraction compresses lymphatic vessels

Question 16

Which of the following best describes the pathway of lymph from the lower limbs back to the bloodstream?

Accepted Answer

Lymphatic capillaries → lymphatic vessels → thoracic duct → left subclavian vein

Question 17

A patient with a genetic defect in the formation of lymphatic valves is most likely to experience which of the following symptoms?

Accepted Answer

Chronic tissue swelling due to lymph backflow

Question 18

Which of the following statements about the spleen is CORRECT?

Accepted Answer

The red pulp is primarily involved in the removal of old red blood cells and storage of platelets

Question 19

Which of the following best describes the role of the respiratory pump in lymphatic circulation?

Accepted Answer

Pressure changes during breathing help propel lymph toward the heart

Lymphatic System and Immunity: Structure and Function

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