ATI RN
Immune System Multiple Choice Questions and Answers Questions
Question 1 of 5
Which component is found in both the classical and alternative pathways and is central to complement activation?
Correct Answer: B
Rationale: C3 is central to both pathways; C1q is classical only, C5a and C9 are downstream.
Question 2 of 5
What aids lymph flow toward the heart?
Correct Answer: A
Rationale: Skeletal muscle contraction milks lymph toward the heart; heart pumps blood, arterial pressure drives blood, and venous return is blood-specific.
Question 3 of 5
What is the primary source of lymph?
Correct Answer: B
Rationale: Interstitial fluid forms lymph; plasma contributes indirectly, digestive juices and sweat are unrelated.
Question 4 of 5
What is the term for swelling due to lymphatic obstruction?
Correct Answer: D
Rationale: Lymphedema is swelling from obstruction; lymphadenitis is node inflammation, lymphangitis is vessel, lymphoma is cancer.
Question 5 of 5
The right lymphatic duct drains lymph from:
Correct Answer: B
Rationale: The right lymphatic duct drains the right arm; thoracic duct drains left arm , lower body , and left leg .