4. Consciousness

Which of the following statements about the circadian rhythm is true?

As _____ accumulates in the body, a person will begin to feel sleepy.

The higher the body temperature, the _____ people are.

According to research, which of the following individuals might need the least amount of sleep?

Natural cycles of activity that bodies must go through are called

The _____ is the internal clock that tells people when to wake up and when to fall asleep.

Which of the following parts of the body controls the sleep-wake cycle?

An example of a biological rhythm is