The spleen is much like a lymph node except that t

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ATI RN Test Bank

The spleen is much like a lymph node except that the spleen

A. does not store lymphocytes B. filters lymph C. filters blood D. does not contain phagocytes

Correct Answer: C

Rationale: The spleen filters blood, not lymph, and contains lymphocytes and phagocytes, unlike lymph nodes.

The only blood cells which are not viewed as a part of the immune system are

A. fat cells B. glial cells C. osteocytes D. red blood cells

Correct Answer: D

Rationale: Red blood cells transport oxygen, not part of immunity.

The lymphatic vessels contain valves that help maintain the one-way flow of lymph. What is the purpose of these valves?

A. To prevent backflow of lymph B. To regulate blood pressure C. To filter lymphatic fluid D. To produce lymphocytes

Correct Answer: A

Rationale: Valves ensure lymph flows toward the heart, preventing backflow.

Which of the following immunity is obtained during a lifetime?

A. Acquired immunity B. Active immunity C. Passive immunity D. None of the above

Correct Answer: A

Rationale: Acquired immunity develops over a lifetime, encompassing active and passive forms.

In order to react to pathogens and remove worn-out red blood cells, the spleen has an abundance of:

A. basophils and lymphocytes B. lymphocytes and macrophage C. macrophage and red blood cells D. red blood cells and platelets

Correct Answer: B

Rationale: Lymphocytes and macrophages in the spleen handle pathogens and cell removal.

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