How does your nervous system respond to a stimulus such as a loud noise, a hot object, or a sudden change in temperature?

 It takes in information through our senses, processes the information and triggers reactions, such as making your muscles move or causing you to feel pain.

Explanation:

For example, if you touch a hot plate, you reflexively pull back your hand and your nerves simultaneously send pain signals to your brain.The same as when the temerature changes or you hear a loud moise. Your brain processes it and it causes your nervous system sends signals that determine how you or your body reacts.

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