AN SC310 Lecture Notes - Lecture 12: Sympathetic Nervous System, Cranial Nerves, Vagus Nerve

• School: University of Alberta
• Department: Animal Science
• Course: AN SC310
• Professor: Burim Ametaj

Document Summary

Parasympathetic and sympathetic activities tend to be opposite of each other. When resting the parasympathetic and sympathetic are active but para dominants the sympathetic. Dual innervation: organs are hooked up to both parasympathetic and sympathetic but they do different things to those organs. Parasympathetic nerves all come from cranial nerves and sacral. Sympathetic comes from the other nerves and not the cranial and sacral. 1 neuron goes directly to the adrenal cortex because it needs to be as fast as possible. There"s 3 possible pathways for the sympathetic nervous system. Adrenergic receptors have 2 alpha receptors (alpha 1, alpha 2) and 3 beta receptors (beta 1, beta 2, beta 3) Alpha 2 is the inhibitor receptor (the only one) Released in response to action potential to postganglionic neuron.