Question 1

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

Accepted Answer

Produces red blood cells in adults

Question 2

Bulk flow across capillary walls is primarily regulated by which two pressure gradients?

Accepted Answer

Hydrostatic and osmotic pressure gradients

Question 3

If more fluid leaves blood capillaries than returns, what condition may result?

Accepted Answer

Edema

Question 4

Which vessel drains lymph from the right side of the head, neck, chest, and arm?

Accepted Answer

Right lymphatic duct

Question 5

What structural feature of lymphatic capillaries allows them to absorb interstitial fluid efficiently?

Accepted Answer

Blind-ended structure

Question 6

Which mechanism does NOT contribute to lymph flow toward the heart?

Accepted Answer

Active contraction of lymphatic capillaries

Question 7

Which lymphatic organ is the site where T lymphocytes mature?

Accepted Answer

Thymus

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 region of the spleen is primarily responsible for immune functions?

Accepted Answer

White pulp

Question 10

The red pulp of the spleen is mainly involved in which function?

Accepted Answer

Removal of old red blood cells and platelets

Question 11

A blockage in the thoracic duct would most likely affect lymph drainage from which area?

Accepted Answer

Left leg

Question 12

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

Accepted Answer

Prevent backflow of lymph

Question 13

Which of the following is a primary lymphatic organ?

Accepted Answer

Thymus

Question 14

Which statement about lymphatic circulation is correct?

Accepted Answer

Lymph flows toward the heart due to skeletal muscle contraction and respiratory pump

Question 15

Which of the following would most likely result from a failure of lymphatic valves?

Accepted Answer

Edema in peripheral tissues

Question 16

Which lymphatic organ is located between the sternum and heart and is largest in children?

Accepted Answer

Thymus

Question 17

Which of the following is true regarding lymph nodules?

Accepted Answer

They do not have a capsule and are found in mucous membranes

Question 18

Which of the following best explains why lymphatic capillaries are blind-ended?

Accepted Answer

To allow one-way entry of interstitial fluid into the lymphatic system

Question 19

Which of the following is the largest mass of lymphoid tissue in the body?

Accepted Answer

Spleen

Question 20

If the lymphatic system fails to return leaked plasma proteins to the blood, what is the most likely consequence?

Accepted Answer

Decreased blood osmotic pressure leading to edema

Lymphatic System and Immunity: Structure and Function

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