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.

the answer is na (sodium)

b.

the accuracy of the data.