Tag Archives | parasympathetic

Autonomic Nervous System

Autonomic Nervous System: regulates involuntary activities ie. Heart and smooth muscle Two divisions: Sympathetic> fight or flight, tachycardia, raise BP, nervousness. Epinephrine and Norepinephrine Parasympathetic> calm down, nausea, vomiting, fainting, abdominal distress Acetylcholine Alpha receptors – vasoconstriction Beta1 – increase heart rate and strength of contraction Beta2 – bronchodilators

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