During a stressful interval, ________.
A) thyroid-stimulating hormone (TSH) stimulates the adrenal cortex and medulla to secrete acetylcholine
B) increased acid in the duodenum stimulates the S cells to release secretin
C) adrenocorticotropic hormone (ACTH) stimulates the adrenal cortex, and neurons of the sympathetic nervous system stimulate the adrenal medulla
D) the calcium levels in the blood are increased due to actions of two antagonistic hormones, adrenaline and noradrenaline

Question

Quizplus · Accepted Answer

During a stressful interval, the hypothalamus releases corticotropin-releasing hormone (CRH), which stimulates the anterior pituitary gland to release adrenocorticotropic hormone (ACTH). ACTH then stimulates the adrenal cortex to release cortisol, which helps the body deal with stress. In addition, neurons of the sympathetic nervous system stimulate the adrenal medulla to release adrenaline and noradrenaline, which also help the body cope with stress. Therefore, option C is the correct answer. Option A is incorrect because TSH stimulates the thyroid gland, not the adrenal glands. Option B is incorrect because increased acid in the duodenum stimulates the release of secretin, which helps regulate the pH of the small intestine, but it does not play a significant role in the body's response to stress. Option D is incorrect because adrenaline and noradrenaline do not impact blood calcium levels.

During a Stressful Interval, ________