Question 1

Which of the following best describes the primary function of lymph in the human body?

Accepted Answer

To return interstitial fluid to the bloodstream and facilitate immune responses

Question 2

Lymphatic capillaries differ from blood capillaries in which of the following ways?

Accepted Answer

Lymphatic capillaries are closed at one end and allow larger molecules to enter

Question 3

A patient presents with swelling in their lower limbs due to impaired lymphatic drainage. This condition is best described as:

Accepted Answer

Lymphedema, resulting from blocked or damaged lymphatic vessels

Question 4

Why are the red bone marrow and thymus gland classified as primary lymphoid structures?

Accepted Answer

They are sites where lymphocytes mature and differentiate

Question 5

Which of the following is NOT a secondary lymphoid structure?

Accepted Answer

Thymus gland

Question 6

Secondary lymphoid structures are termed 'secondary' because:

Accepted Answer

They are sites where immune responses are initiated and lymphocytes encounter antigens

Question 7

Which of the following best describes the physiologic action of lymph nodes?

Accepted Answer

They filter lymph and facilitate immune cell activation

Question 8

Lymphadenitis is defined as:

Accepted Answer

Inflammation of the lymph nodes, often due to infection

Question 9

A patient is diagnosed with lymphadenopathy. Which of the following best describes this condition?

Accepted Answer

Enlargement of lymph nodes due to various causes, including infection and malignancy

Question 10

Which of the following actions is performed by the spleen in connection with the lymphatic system?

Accepted Answer

Production of lymphocytes and removal of old erythrocytes

Question 11

The tonsils play a role in immune defense by:

Accepted Answer

Trapping pathogens entering through the mouth and nose

Question 12

Which tonsil is primarily responsible for protecting the nasopharynx?

Accepted Answer

Pharyngeal tonsil (adenoid)

Question 13

Which area of the body is protected by MALT (mucosa-associated lymphatic tissue)?

Accepted Answer

The mucosal surfaces of the gastrointestinal, respiratory, and genitourinary tracts

Question 14

A patient with a splenic injury is at increased risk for which of the following?

Accepted Answer

Reduced immune response due to decreased lymphocyte production and filtration

Question 15

If lymphatic capillary action is impaired, which of the following is most likely to occur?

Accepted Answer

Accumulation of interstitial fluid and increased risk of lymphedema

Question 16

Which of the following equations best represents the net movement of fluid in and out of lymphatic capillaries?

Accepted Answer

$$ J = K 	imes (P_{interstitial} - P_{lymph}) $$

Question 17

Which of the following scenarios best illustrates the function of MALT?

Accepted Answer

A patient ingests contaminated food, and immune cells in the gut respond to pathogens

Question 18

Which of the following is a multi-step process involving both primary and secondary lymphoid structures?

Accepted Answer

Lymphocyte maturation in the thymus followed by antigen encounter in the lymph node

Question 19

A patient with chronic tonsillitis is most likely to experience increased susceptibility to infections in which region?

Accepted Answer

The oral and pharyngeal regions

Question 20

Which of the following best explains why lymph nodes swell during an infection?

Accepted Answer

Accumulation of immune cells and proliferation in response to pathogens

BIO 431ST Lymphatic System Study Guide – Step-by-Step Guidance

Study Guide - Practice Questions