Question

exam 1 will cover material from chapters 1,2, & 5. you will have a total of 70 minute
questions are presented one at a time and backtracking is prohibited (once you answ
locked). do not begin the test unless you are ready to complete it.
question 37
which of the following hormones regulates our sleep - wakefulness cycle?
○ c)melatonin
○ b)testosterone
○ a)estrogen
○ d)adrenaline

Explanation:

To determine the hormone regulating the sleep - wakefulness cycle, we analyze each option:

• Option A: Estrogen is mainly involved in the development and regulation of the female reproductive system and secondary sexual characteristics, not the sleep - wake cycle.
• Option B: Testosterone is the primary male sex hormone, responsible for male sexual development and other related functions, not sleep - wake regulation.
• Option C: Melatonin is a hormone produced by the pineal gland. It plays a crucial role in regulating the circadian rhythm, which includes the sleep - wakefulness cycle. It helps to signal the body when it's time to sleep and wake up.
• Option D: Adrenaline (epinephrine) is involved in the body's "fight - or - flight" response, increasing heart rate, blood pressure, etc., and is not related to the sleep - wake cycle.

Answer:

C) Melatonin