What factor might influence the hypothalamus to release the hormones necessary for the human reproductive cycle?
A) Light
B) Heat
C) Cold
D) Humidity
A
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Light has been found to have an influence on the functioning of the hypothalamus. Increased light levels boost the release of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) and increase the release of estrogen and progesterone. Heat, cold, and humidity have not been shown to play a role in human reproduction unless temperature extremes occur and increase stress significantly.
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