Effects of the sympathetic and parasympathetic nervous systems

Part of body

Effects of sympathetic stimulation

Effects of parasympathetic stimulation

Heart

Increases heart rate

Slows down heart rate

Lungs

Dilates bronchi to increase respiration

Slows down breathing rate

Blood vessels

Dilates blood vessels

Constricts blood vessels

(Continued)

Part of body

Effects of sympathetic stimulation

Effects of parasympathetic stimulation

Adrenal glands

Stimulates release of adrenalin

Sweat glands

Stimulates/increases the secretion of sweat

Digestive

Reduces peristalsis

Increases peristalsis

Liver

Increases conversion of glycogen to glucose by liver

Increases conversion of glucose to glycogen

Bladder

Relaxes bladder

Contracts bladder

Skin

Contricts arterioles so less blood flows near skin surface (skin looks pale)

Eyes

Dilates pupils

Constricts pupils

Fig 8.9 The autonomic nervous system

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