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By which of the following mechanisms is the release of insulin primarily controlled?
A. Mechanical.
B. Hormonal.
C. Humoral.
D. Neural.
Correct Answer: C.
The release of insulin is controlled primarily by the presence or absence of glucose in the blood plasma (humorally). There is limited control of insulin release by the autonomic nervous system at the onset of food ingestion, but this is not the primary means by which the release of insulin is controlled (choice C is better than choice D). The release of insulin is not controlled via mechanical processes (choice A is wrong), nor is it controlled by another hormone (a tropic hormone, choice B is wrong).
I got this question from the website mcatquestionoftheday.com and 80% of people picked B, but C makes definitely more sense.
A. Mechanical.
B. Hormonal.
C. Humoral.
D. Neural.
Correct Answer: C.
The release of insulin is controlled primarily by the presence or absence of glucose in the blood plasma (humorally). There is limited control of insulin release by the autonomic nervous system at the onset of food ingestion, but this is not the primary means by which the release of insulin is controlled (choice C is better than choice D). The release of insulin is not controlled via mechanical processes (choice A is wrong), nor is it controlled by another hormone (a tropic hormone, choice B is wrong).
I got this question from the website mcatquestionoftheday.com and 80% of people picked B, but C makes definitely more sense.
