Question 1

Which of the following best describes the primary function of lymph nodes in the lymphatic system?

Accepted Answer

They filter lymph and house lymphocytes to initiate immune responses.

Question 2

A patient presents with a swollen, tender lymph node in the neck following a bacterial infection. What is the most likely explanation for this swelling?

Accepted Answer

The lymph node is filtering pathogens and housing proliferating lymphocytes, resulting in a bubo.

Question 3

Which of the following correctly ranks the lymphatic vessels from smallest to largest?

Accepted Answer

Lymphatic capillaries \u003c Lymphatic vessels \u003c Lymphatic ducts

Question 4

Which of the following statements about the spleen is correct?

Accepted Answer

The spleen removes bloodborne pathogens and aged red blood cells.

Question 5

A patient develops lymphedema in the right arm after lymph node removal during cancer surgery. Which of the following best explains the cause of this condition?

Accepted Answer

Obstruction of lymphatic drainage leading to accumulation of interstitial fluid.

Question 6

Which of the following best describes the function of minivalves in lymphatic capillaries?

Accepted Answer

They allow interstitial fluid to enter the lymphatic capillaries but prevent its escape.

Question 7

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

Accepted Answer

Producing hormones for metabolic regulation.

Question 8

Which of the following is a key difference between lymphangitis and lymphedema?

Accepted Answer

Lymphangitis is caused by infection and inflammation of lymphatic vessels, while lymphedema is caused by blockage or removal of lymphatic vessels.

Question 9

Which of the following is NOT considered a major MALT (Mucosa-Associated Lymphoid Tissue)?

Accepted Answer

Thymus

Question 10

A 10-year-old child has a thymus that is much larger relative to body size than that of an adult. What is the primary function of the thymus in this child?

Accepted Answer

Maturation of T lymphocytes for immune function.

Question 11

Which of the following best explains why lymph flows slowly through lymph nodes?

Accepted Answer

There are more afferent vessels than efferent vessels, causing a bottleneck effect.

Question 12

A biopsy of a swollen lymph node reveals cancer cells but no signs of infection. What is the most likely explanation?

Accepted Answer

The lymph node is acting as a secondary cancer site due to metastasis.

Question 13

Which of the following statements about the thymus is correct?

Accepted Answer

The thymus is most active during childhood and is the site of T lymphocyte maturation.

Question 14

Which of the following best describes the function of Peyer's patches?

Accepted Answer

They guard the intestinal wall against pathogens entering from the gut.

Question 15

A patient with a ruptured spleen is at increased risk for which of the following?

Accepted Answer

Reduced removal of bloodborne pathogens and aged red blood cells.

Question 16

Which of the following equations best represents the relationship between the volume of lymph returned to the bloodstream ($$V_{lymph}$$), the rate of lymph flow ($$Q_{lymph}$$), and time ($$t$$)?

Accepted Answer

$$V_{lymph} = Q_{lymph} 	imes t$$

Question 17

Which of the following is a unique feature of the thymus compared to other lymphatic organs?

Accepted Answer

It does not directly fight antigens but is the site of T cell maturation.

Question 18

A patient has an infection in the pharyngeal region. Which MALT structure is most likely to be involved in the initial immune response?

Accepted Answer

Tonsils

Question 19

Which of the following best explains why the lymphatic system is essential for cardiovascular homeostasis?

Accepted Answer

It returns excess interstitial fluid to the bloodstream, preventing edema and maintaining blood volume.

Question 20

A patient with a blocked thoracic duct would most likely experience which of the following symptoms?

Accepted Answer

Edema in the lower limbs and left side of the body due to impaired lymph drainage.

Chapter 20: The Lymphatic System and Lymphoid Organs and Tissues - Study Guide

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