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Sympathetic Nervous System: Crash Course A&P #14

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 Biology   |   Health   |   Psychology   |   Science
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Description

Hank tries not to stress you out too much as he delves into the functions and terminology of your sympathetic nervous system.

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Table of Contents
Sympathetic Nervous System Controls the Body's Stress Response 0:26
How Signals Travel to Effectors 1:48
Acetylcholine in the Ganglion 3:55
Norepinephrine at the Effector 4:42
Norepinephrine and Epinephrine Are Secreted as Hormones 5:35
Alpha Receptors Cause Smooth Muscles to Constrict 7:14
Beta Receptors Cause Smooth Muscles to Relax 7:27


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Crash Course is now on Patreon! You can support us directly (and, for the next month, have your contributions matched by Patreon!) by signing up at http://www.patreon.com/crashcourse

Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:

Mark Brouwer, Simun Niclasen, Brad Wardell, Roger C. Rocha, Jan Schmid, Elliot Beter, Nevin Spoljaric, Sandra Aft, SR Foxley, Jessica Simmons, Stefan R. Finnerup, Jason A Saslow, Robert Kunz, Jessica Wode, Mike Drew, Steve Marshall, Anna-Ester Volozh, Christian Ludvigsen, Jeffrey Thompson, James Craver

***SUBBABLE MESSAGES***

TO: Ariela
FROM: Gavi

I love you so much, stay awesome as always!

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TO: Josiah P.
FROM: Amy P.

I love you!

***SUPPORTER THANK YOU!***

Thank you so much to all of our awesome supporters for their contributions to help make Crash Course possible and freely available for everyone forever:

Pankaj Gurung
Kelley Culp
Joshua McKee
Amory Olson: Kasson-Mantorville High School Science Instructor
Jack Thakar
Arrow Worthy
Magnus "Krox" Krokstad
Rachel Lee
Brian J. Rolf
Sylien

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