Regarding sleep,which of the following statements is/are TRUE?
A) Sleep is caused by the accumulation of chemicals in the blood.
B) Whether one is awake or asleep depends on the balance between separate sleep and waking systems.
C) The brain tends to "shut down" during sleep, with brain activity decreasing dramatically.
D) All of these statements are true.

Question

Quizplus · Accepted Answer

Option A is false as there is no evidence to suggest that sleep is caused by the accumulation of chemicals in the blood. Option C is also false as the brain remains active during sleep, with different patterns of brain waves observed during the different stages of sleep. Option B, on the other hand, is true as the sleep-wake cycle is regulated by two separate but interacting systems in the brain, the sleep-promoting system, and the wake-promoting system. The balance between these two systems determines whether one is awake or asleep.

Regarding Sleep,which of the Following Statements Is/are TRUE