A national poll conducted in 2009 found that ________ of American adults experience short sleep every night of the week.
A) 25 percent
B) 30 percent
C) 45 percent
D) 50 percent
Question 2
Remaining active during sleep, the brain's ________ is the thinking area and outermost bark of the cerebrum.
A) hypothalamus
B) pons
C) pineal gland
D) cerebral cortex