The parasympathetic nervous system is one of three divisions of the autonomic nervous system. Sometimes called the rest and digest system, it conserves energy as it slows heart rate, increases intestinal and gland activity, and relaxes sphincter muscles in gastrointestinal tract.
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This division prepares the body for 'fight or flight' during any potential danger. It's like hitting the gas pedal in your car when you need to speed up quickly.
A neurotransmitter involved in learning, memory and muscle contractions. It’s like the messenger delivering instructions from your brain to your muscles.