This body system responds to the environment quickly.
This body system responds to the environment slowly.
The testes produce the hormone
Melatonin is produced by the ____________. Melatonin regulates __________.
The cell that sends messages around the body is the
This body system sends signals through the body using hormones.
What are the main structures of the nervous system?
True or False: One reason the teenage brain is different than the adult brain is that decisions are more emotional than logical.
The hypothalamus
The pancreas produces ________ to regulate _______.
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