If you accidentally grab the handle of a hot pan, your sensory nerves will trigger ___________.
A)a nerve impulse to your spinal cord.You will immediately pull your hand from the hot handle but that message will never be sent on to your brain
B)a nerve impulse to your brain.You will pull your hand from the hot handle once your brain processes that information, which takes less than half of a second
C)a nerve impulse to your wrist.You will pull your hand from the hot handle but the message will not be sent to your central nervous system
D)simultaneous nerve impulses to your spinal cord and brain.However, you will pull your hand from the hot handle without the nerve impulse having to be processed in your brain

Question

Quizplus · Accepted Answer

The correct answer is D because when you grab a hot pan, the sensory nerves in your hand send signals both to your spinal cord and brain. The reflex action that causes you to immediately pull your hand away is mediated by the spinal cord, without the need for brain processing. This is a protective reflex mechanism to prevent injury.

If You Accidentally Grab the Handle of a Hot Pan