Question

adrenaline - a hormone that prepares the body to react quickly
comprehension questions

1. what is the main difference between the nervous system and the endocrine system?
2. what is a hormone, and how does it travel through the body?

Explanation:

1. The nervous system uses electrical impulses and neurotransmitters for rapid, short - lived responses, while the endocrine system uses hormones released into the bloodstream for slower, long - lasting effects.
2. A hormone is a chemical messenger produced by endocrine glands. It travels through the bloodstream to reach target cells or organs.

Answer:

1. The nervous system has rapid, short - lived responses via electrical impulses and neurotransmitters, while the endocrine system has slower, long - lasting responses via hormones in the bloodstream.
2. A hormone is a chemical messenger made by endocrine glands and travels through the bloodstream.