Which of the following alternatives best represents the sequence of events by which melatonin is secreted in the blood?
A) suprachiasmatic nucleus - pineal gland - melatonin
B) pineal gland - suprachiasmatic nucleus - melatonin
C) suprachiasmatic nucleus + pineal gland - melatonin
D) suprachiasmatic nucleus - pituitary gland - melatonin

Question

Quizplus · Accepted Answer

Melatonin is produced by the pineal gland under the control of the suprachiasmatic nucleus, which is responsible for regulating our circadian rhythms. The suprachiasmatic nucleus sends signals to the pineal gland to release melatonin in response to darkness and inhibit its release in response to light. Therefore, the correct sequence of events is suprachiasmatic nucleus - pineal gland - melatonin.

Which of the Following Alternatives Best Represents the Sequence of Events