People with narcolepsy have abnormally few brain cells that produce
A)melatonin.
B)lipochrome.
C)rhodopsin.
D)orexin.

Question

Quizplus · Accepted Answer

Narcolepsy is caused by a deficiency of orexin-producing cells in the brain. Orexin is a neuropeptide that regulates wakefulness and is responsible for the maintenance of a normal sleep architecture. Without sufficient amounts of orexin, people with narcolepsy experience excessive daytime sleepiness, as well as other symptoms such as cataplexy (loss of muscle tone) and sleep paralysis.

People with Narcolepsy Have Abnormally Few Brain Cells That Produce