How are the nervous system and the endocrine system different?

One of the significant difference between the nervous system and endocrine system is that the nervous system uses electrical impulses to send messages through neurons while endocrine glands use hormones to send messages to the target cells through the bloodstream.  the endocrine system uses chemical signaling (hormones, produced by glands) while the nervous system uses electrical signaling (neural impulses). ... Signal transmission in the endocrine system is slow, since hormones must travel through the bloodstream, but the responses tend to last longer.

The nervous system and the endocrine system allow information to be ... While neurons are the building blocks of the body's communication system, it is ... two different systems: the somatic nervous system and the autonomic nervous system.

Explanation:

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b.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.