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, epinephrine and norepinephrine

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23-08-2022
Biology

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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, epinephrine and norepinephrine

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aadildhillon023 aadildhillon023 · Answer 1 · 2022-08-25T18:38:15+02:00

During a stressful interval, adrenocorticotropic hormone (ACTH) stimulates the adrenal cortex, and neurons of the sympathetic nervous system stimulate the adrenal medulla.

Hence, option C is correct.

Now lets check all statement one by one

Option A : Thyroid-stimulating hormone, also known as thyrotropin, thyrotrophic hormone, or simply TSH, is a pituitary hormone that stimulates the thyroid to generate thyroxine (T4) and later triiodothyronine (T3), which promotes the metabolism of nearly all bodily tissues.

So, option A is incorrect.

Option B : Secretin is released by S cells in the small intestine. The release of secretin is stimulated by gastric acid, facilitating movement into the duodenal lumen. Secretin promotes a decrease in stomach H+ secretion while increasing pancreatic and biliary bicarbonate secretion. Pancreatic fluid that is rich in bicarbonate is secreted when secretin is present.

So, option B is incorrect.

Option C : The body releases the hormone adrenaline to recover from the stress condition. The receptors detect the stressful situation, and the adrenocorticotropic hormone stimulates the adrenal cortex, causing the release of the hormone adrenaline. To adapt to the fight-or-flight situation, the hormone causes the body's sympathetic nervous system to become active.

So, option C is correct.

Option D : As a result of their completely opposing effects, calcitonin and PTH are referred to as antagonistic hormones. PTH is released when blood calcium levels are too low, whereas calcitonin is released when blood calcium levels are excessively high. There is evidence that both of these hormones control blood Ca++ levels.

So, option D is incorrect.

Thus from the above conclusion we can say that during a stressful interval, adrenocorticotropic hormone (ACTH) stimulates the adrenal cortex, and neurons of the sympathetic nervous system stimulate the adrenal medulla.

Learn more about the adrenocorticotropic hormone (ACTH) here:

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