Question

Our natural daily patterns of waking and sleep are called – rhythms. Exposure to daylight or darkness causes the hypothalamus to signal the – gland, which regulates the amount of – in the bloodstream, so that production of this hormone is – during daylight hours than at night.

Answer 1

Answer:

circadian

pineal

melatonin

lower

Explanation:

Our natural daily patterns of waking and sleep are called circadian rhythms. Exposure to daylight or darkness causes the hypothalamus to signal the pineal gland, which regulates the amount of melatonin in the bloodstream, so that production of this hormone is lower during daylight hours than at night.