Which factor is released from mast cells?

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Pediatric Nursing Test Bank Questions

Question 1 of 5

Which factor is released from mast cells?

Correct Answer: C

Rationale: Histamine is a primary mediator released from mast cells during allergic reactions.

Question 2 of 5

A 7-year-old boy presented with recurrent eye blinking behavior and recurrent extension of extremities. The mother describes the movement as sudden, rapid, and repetitive movements, present for the last 9 months. Of the following, the MOST appropriate diagnosis is

Correct Answer: A

Rationale: Tourette's disorder involves multiple motor tics and at least one vocal tic persisting for over a year, fitting the description provided.

Question 3 of 5

Somatoform disorders, as part of psychosomatic illness, include all of the following EXCEPT

Correct Answer: B

Rationale: Somatoform disorders involve physical symptoms without a clear medical explanation. Asthma has a clear physiological basis and is not considered a somatoform disorder.

Question 4 of 5

Timing of an innocent murmur is usually:

Correct Answer: A

Rationale: Innocent murmurs are typically ejection systolic murmurs due to normal blood flow turbulence in a structurally normal heart. They are soft, vibratory, and heard best over the left sternal border, increasing with fever or excitement.

Question 5 of 5

The risk of developing infective endocarditis is the least in a patient with

Correct Answer: D

Rationale: A large atrial septal defect has low turbulence and pressure gradients, making it less likely to develop infective endocarditis compared to high-pressure lesions such as VSDs or valvular regurgitations.

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