its just short for okay
Axon sends the message. Dendrite receives it.
you enter a code (typing) which sends a message to the "iner workings" of the computer then that message get sent to a silacon panel which then puts the code on your screen which all happens at a lighting fast speed
It depends what the message is.
myelinated
Retina
The secret message sends messages secretly.
When you want to move a muscle, your brain sends a message out to the muscle you want to move, and the muscle sends a message back to your brain that your moving it and where.
Your afferent neurons send a message to your brain.
Afferent
It sends the message to your brain of what your seeing
The sender. (The terms messenger and message are applied to the carrier of messages.)
It sends the message to your brain of what your seeing