Peripheral Nervous System Flashcards
Sympathetic Effects on the Eye
- relaxation of ciliary muscle
- contraction of the iris radial muscle (mydriasis)
- decrease aqueous humor production
Parasympathetic Effects on the Eye
- contraction of the ciliary muscle
- contraction of the iris sphincter muscle (miosis)
Sympathetic Effects on the Heart
- increased heart rate (tachycardia)
- increased contractility
- increased automaticity and conduction of AV node
Parasympathetic Effects on the Heart
- decreased heart rate (bradycardia)
- decreased contractility
- decreased AV node conduction
Sympathetic Effects on the Vasculature
- alpha-1: vasoconstriction
- beta-2: vasodilation
- alpha-2: various
Parasympathetic Effects on the Vasculature
- indirect vasodilation through release of NO
Sympathetic Effects on the Lungs
Beta-2: bronchodilation
Parasympathetic Effects on the Lungs
- bronchoconstriction
- increased respiratory secretions
Sympathetic Effects on the GI Tract
- decreased motility
- close sphincters
- inhibit secretion
Parasympathetic Effects on the GI Tract
- increased motility
- relax sphincters
- stimulate secretion
Sympathetic Effects on the Bladder
- Beta-2: relax detrusor muscle
- Alpha-1: contract sphincter
Parasympathetic Effects on the Bladder
- contract detrusor muscle
- relax sphincter
When acetylcholine is released at the parasympathetic terminal synapse, it produces what signs?
- diarrhea
- urination
- miosis (constriction of pupil)
- bronchoconstriction
- bradycardia
- emesis (increased GI motility)
- lacrimation
- salivation
Effects of Alpha-1 Receptor
- vasoconstriction
- mydriasis
Effects of Alpha-2 Receptor
- sedation/analgesia
- vasoconstriction/dilation
