Question

Suppress brain activity by blocking the ability of nerves in the brain to send or receive signal.

Answer 1

Circulatory system controls all of your actvity and it transfferes blood to your brain so you wont have  a stroke

Answer 2

Barbiturates

Step-by-step explanation:

They suppress brain activity by blocking the ability of nerves in the brain to send or receive signals. Barbiturates have been used to treat anxiety, sleeping disorders, and epilepsy.