Introduction to Psychology 10th Edition by Rod Plotnik,Haig Kouyoumdjian

Exercise 11

The biological clock that is set for a day of about 24 hours is called a (a) _____. This rhythm regulates our sleep-wake cycle, which is set to an average day of 24 hours and 18 minutes. Our circadian clock is reset by 18 minutes each day to match our agreed-upon 24-hour day. The circadian clock is located in the brain's hypothalamus, in a small part called the (b) _____.