Multiple Choice
Which hormone is primarily responsible for controlling the milk-let-down (milk ejection) reflex during lactation?
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16. The Endocrine System
Introduction to the Endocrine System
Multiple Choice
Which endocrine glands primarily control reproduction and fertility by producing gametes and secreting sex hormones?
A
Thyroid gland
B
Adrenal glands
C
Gonads (ovaries and testes)
D
Pineal gland
Verified step by step guidance1
Step 1: Understand the role of endocrine glands in reproduction and fertility. Endocrine glands secrete hormones that regulate various body functions, including reproduction.
Step 2: Identify the glands listed in the problem: Thyroid gland, Adrenal glands, Gonads (ovaries and testes), and Pineal gland.
Step 3: Recall the primary functions of each gland: The thyroid gland regulates metabolism; adrenal glands produce stress hormones; pineal gland regulates circadian rhythms.
Step 4: Recognize that the gonads (ovaries in females and testes in males) are responsible for producing gametes (eggs and sperm) and secreting sex hormones such as estrogen, progesterone, and testosterone.
Step 5: Conclude that the gonads are the endocrine glands that primarily control reproduction and fertility by producing gametes and secreting sex hormones.
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