Multiple Choice
In the endocrine system, which hormone primarily increases blood glucose levels?
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16. The Endocrine System
Introduction to the Endocrine System
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Which endocrine gland secretes the hormone melatonin?
A
Anterior pituitary gland
B
Adrenal cortex
C
Thyroid gland
D
Pineal gland
Verified step by step guidance1
Understand that the question asks which endocrine gland secretes the hormone melatonin, so focus on the glands listed and their primary hormone products.
Recall that the anterior pituitary gland secretes hormones like growth hormone, prolactin, and ACTH, but not melatonin.
Remember that the adrenal cortex produces steroid hormones such as cortisol and aldosterone, not melatonin.
Know that the thyroid gland produces thyroid hormones (T3 and T4) and calcitonin, but not melatonin.
Identify that the pineal gland is the endocrine gland responsible for secreting melatonin, which regulates circadian rhythms and sleep-wake cycles.
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