It is easy to know the difference between being asleep and being awake because the sleep homeostat helps us understand when we have passed from waking into sleep.

Question

Quizplus · Accepted Answer

The sleep homeostat indicates the need for sleep based on how long we've been awake, but it doesn't help us understand the moment we transition from wakefulness to sleep. This transition can often be subtle and not easily perceived.

It Is Easy to Know the Difference Between Being Asleep