Sympathetic Nervous System: Crash Course A&P

The video explores the sympathetic nervous system's role in stress response, highlighting how neurotransmitters and hormones like acetylcholine and norepinephrine facilitate communication between neurons and effectors. It explains the dual role of norepinephrine as both a neurotransmitter and hormone, depending on its pathway. The video also covers how different receptors, such as alpha and beta receptors, influence the body's response to stress. Finally, it discusses the impact of chronic stress on health and introduces the parasympathetic system as a counterbalance.

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