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Unit 2 H

ANS (para/sympathetic) chart

Target Organ/system Sympathetic effects Parasympathetic effects
Eyes ( iris) Stimulates dilator muscles, dilates eye pupils Stimulates constrictor muscles: constricts eye pupils
Sweat Glands Stimulates copious sweating No effect
Arrector pilorum muscles Stimulates to contract( erect hairs, goosebumps ) No effect
Heart Muscle Increases heart rate and force of heartbeat Decreases heart rate; slows down and steadies heart
Digestive tract organs Decreases activity of glands and muscles of the digestive system and constricts sphincters Increased motility ( peristalsis) and amount of secretion by digestive organs; relaxes sphincters to allow movement of food along tract
Blood vessles Constricts most vessels and increases blood pressure ; constricts vessels of abdominal viscera and skin Little or no effect
Mental Activity Increases alertness No effect
Male Penis Ejaculation (S-Shoot) Erection (P-Point)
Glands (nasal,lacrimal,salivary,gastric,pancreas) Inhibits secretory activity; causes vasoconstriction of blood vessels supplying the glands Stimulates Secretory activity
Created by: osabdelr



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