Question

assignment: chapter 9. check yourself (practice)
questions sc4kb14h_ch09.01m
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what are the two main communication systems of the body?
a. nervous and endocrine systems
b. nervous and respiratory systems
c. nervous and circulatory systems
d. circulatory and endocrine systems

Explanation:

The nervous system uses electrical and chemical signals for rapid communication, while the endocrine system uses hormones for slower - acting, long - term communication throughout the body. These two systems are the main communication systems in the body.

Answer:

A. Nervous and endocrine systems