Why is it that sometimes when you take caffeine that only your heart beats faster but your mind stays tired (or becomes even more tired)?

Question

Why is it that sometimes when you take caffeine that only your heart beats faster but your mind stays tired (or becomes even more tired)?

In: Biology

Answer 1

Caffeine doe not make you more awake, it helps prevent you from becoming tired. The sugar is what “wakes” you up. The “shape” of the caffeine molecule is the same shape as the receptor that recognizes you are sleepy. Square block goes in square hole. Except both caffeine and the “sleepy” molecule are the same shape “square”. So it fills that square hole before the sleep one will until it wears off.