Question 1

Which of the following best describes the primary function of lymphatic capillaries?

Accepted Answer

They collect excess interstitial fluid and return it to the bloodstream.

Question 2

A patient has a blockage in the right lymphatic duct. Which of the following areas would most likely experience edema as a result?

Accepted Answer

Right arm

Question 3

Which of the following statements about lymph nodes is correct?

Accepted Answer

Lymph nodes are sites where lymphocytes are produced and immune responses are initiated.

Question 4

Which lymphatic organ is responsible for removing aged red blood cells and debris from the blood?

Accepted Answer

Spleen

Question 5

A surgeon accidentally damages the thoracic duct during a procedure. Which of the following is the most likely consequence?

Accepted Answer

Impaired drainage of lymph from the left side of the body and both lower limbs

Question 6

Which of the following best explains why lymphatic capillaries are more permeable than blood capillaries?

Accepted Answer

They have overlapping endothelial cells that act as one-way valves.

Question 7

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

Accepted Answer

Producing hormones for metabolism

Question 8

A patient presents with swelling in the lower limbs due to lymphatic obstruction. Which of the following best explains the physiological basis for this swelling?

Accepted Answer

Decreased absorption of interstitial fluid by lymphatic vessels

Question 9

Which of the following equations correctly represents the net movement of fluid at the capillary level, considering hydrostatic and osmotic pressures?

Accepted Answer

$$ Net\ filtration = (P_c - P_i) - (\pi_c - \pi_i) $$

Question 10

Which of the following best describes the role of valves in lymphatic vessels?

Accepted Answer

They prevent the backflow of lymph, ensuring one-way movement toward the heart.

Question 11

Which of the following is a correct pairing of a lymphatic organ and its primary function?

Accepted Answer

Spleen: Initiates immune responses and removes old red blood cells

Question 12

A newborn is diagnosed with a congenital absence of lymph nodes. Which of the following would most likely be impaired?

Accepted Answer

Initiation of immune responses to pathogens

Question 13

Which of the following best explains why the lymphatic system is essential for maintaining blood volume?

Accepted Answer

It returns excess interstitial fluid to the bloodstream.

Question 14

Which of the following is the correct sequence of lymph flow from the tissues back to the bloodstream?

Accepted Answer

Lymphatic capillaries → Lymphatic vessels → Lymph nodes → Lymphatic ducts → Subclavian veins

Question 15

A patient has a tumor compressing the left subclavian vein. Which of the following is a likely consequence?

Accepted Answer

Impaired return of lymph from the left side of the body and both lower limbs

Question 16

Which of the following best describes the function of the thymus?

Accepted Answer

It is the site of T lymphocyte maturation.

Question 17

Which of the following is a unique feature of lymphatic capillaries compared to blood capillaries?

Accepted Answer

They are closed at one end, forming blind-ended tubes.

Question 18

Which of the following best explains why lymphatic vessels are important for fat absorption?

Accepted Answer

They transport chylomicrons from the intestinal villi to the bloodstream.

Question 19

A patient with a splenectomy (removal of the spleen) is at increased risk for which of the following?

Accepted Answer

Increased susceptibility to infections

Question 20

Which of the following best describes the function of lymphatic valves?

Accepted Answer

They prevent the backflow of lymph, ensuring unidirectional flow.

The Lymphatic System: Structure, Function, and Components

Guida di studio - Domande di pratica

Study guide - Flashcard