When you touch something very hot, you move your hand away from the object as soon as you feel the hot sensation. Why?
a. The muscle contract before the message reaches the brain.
b. The blood moves faster because of the heat.
c. The message travels fast because of the heat.
d. The messages to and from the brain travel fast through the nerves.
Pa help pls, thanks... (*^_^*)
a. The muscle contract before the message reaches the brain.
b. The blood moves faster because of the heat.
c. The message travels fast because of the heat.
d. The messages to and from the brain travel fast through the nerves.
Pa help pls, thanks... (*^_^*)
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Answer:
A.
Explanation:
If you touch something that is very hot, your hand moves away quickly before you even feel the pain. You don't have to think about it because the response is a reflex that does not involve the brain. A reflex is a rapid, unlearned, involuntary (automatic) response to a stimulus (change in the environment).
Answer:
D. The messages to and from the brain travel fast through the nerves.