7. Which hormone initiates the HPA axis stress response?

A. ACTH
B. Cortisol
C. CRH
D. Vasopressin

Question

7. Which hormone initiates the HPA axis stress response?

A. ACTH
B. Cortisol
C. CRH
D. Vasopressin

BlackTom AI · Accepted Answer

The question asks: 7. Which hormone initiates the HPA axis stress response?

Options presented:
A. No answer text provided.
B. CRH
C. No answer text provided.
D. C.

Start by evaluating each choice on its face:
Option A: 'No answer text provided.' This is not a named hormone and thus does not offer any biological claim. It cannot be the correct answer because it fails to identify a molecule involved in the HPA axis.
Option B: 'CRH' stands for corticotropin-releasing hormone. This hormone is produced in the hypothalamus and initiates the HPA axis cascade by stimulating the pituitary to release ACTH, which then leads to cortisol release from the adrenal glands. This aligns with the established sequence of the HPA axis, so this option is correct.
Option C: 'No answer text provided.' Like option A, this is merely a placeholder and does not specify any hormone. It does not satisfy the question about which molecule initiates the stress response, so it is incorrect.
Option D: 'C.' is an abbreviation that lacks any chemical identifier. Without a clear hormone name, it cannot be considered correct in the context of initiating the HPA axis. It confuses labeling with a factual term and should be viewed as incorrect.

In summary, only the option that explicitly names CRH corresponds to the initiating hormone of the HPA axis. The other options are nonspecific placeholders or ambiguous labels that do not identify any initiating molecule, making them incorrect.

202570_PSYC3_73232 Final Exam: Part ONE A Multiple Choice (Remotely Proctored)

7. Which hormone initiates the HPA axis stress response? A. ACTH B. Cortisol C. CRH D. Vasopressin

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