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The result is an increase in the heart rate. Conversely, stimulating the parasympathetic nervous system (vagal nerves to the heart) increases the resting potential and decreases the rate of diastolic depolarization; under these circumstances the heart rate slows. The...
Sympathetic and Parasympathetic Effects. Effects on various systems and organs: Eye: dilation of pupil; focusing for distance vision. constriction of pupil; focusing for near vision. Skin: Sweat glands: (S) â increases secretion. (P) â none (not innervated) Arrector pili muscles: (S) â contraction and erection of hairs.