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Earlier discussion
2 older comments kept for context.
CHUKA MIKE
The nervous and endocrine systems both work to bring about this adaptation, but their response patterns are different. The nervous system and the endocrine system use chemical messengers to signal cells, but the speed at which these messages are transmitted and the length of their effects differs
The endocrine system secretes hormones into blood and other body fluids. These chemicals are important for metabolism, growth, water and mineral balance, and the response to stress. Hormones provide feedback to the brain to affect neural processing. Reproductive hormones affect the development of the nervous system.
INVOLVE THE USE OF CHEMICAL SUBSTANCES IS CORRECT
CORRECT 100%
CHUKA MIKE
involve the use of chemical substances