Predominant Autonomic Tone at Various Neuroeffector Junctions and the Effect Produced by Ganglionic Blockade
Effect of Ganglionic Blockade
Tissues predominantly under parasympathetic (cholinergic) tone Myocardium
Atrium;S-A node Tachycardia Eye
Ciliary muscle Cycloplegia
GI tract Decrease in tone and motility; con stipation
Urinary bladder Urinary retention
Salivary gland Dry mouth
Tissues predominantly under sympathetic (adrenergic) tone
Ventricles Decrease in contractile force
Arterioles Vasodilation; increase in peripheral blood flow;hypotension Veins Vasodilation; pooling of blood; de crease in venous return; decrease in cardiac output Sweat glandsa Decrease in secretion aAnatomically sympathetic; transmitter is ACh.
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