0.000000001 seconds!!
Your afferent neurons send a message to your brain.
neurotransmitters
Your eyes send a message to your brain and then your brain sends a message back telling you what your seeing.
MAGIC!!!!! no really, sound travels underwater even fast than out of water. sound is just a vibration that your eardrums hear and send the message to your brain, and your brain converts it into a message that we know as sounds!
Brain
No.
decrease in pH
its send this message telling you to do the thing you wanted to do.
nerve tissue
Because all colors send a message to the brain. In this case red makes you irritated.
The vestibulocochlear nerve, or 8th cranial nerve.
Motor neurone send message from the brain to the affector