PHGY 209 Lecture Notes - Lecture 24: Vagus Nerve, Autonomic Nervous System, Choline
21 Feb 2018
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The ans controls smooth muscle; it is a branch of the nervous system that controls the internal organs. Communication of how neurons communicate with each other and interact with muscle fibers was a topic of controversy. The information was relayed as an electrical impulse from one cell to another. The information is travels as an electrical impulse, but it is transferred to another cell as a chemical signal, which is then converted back to an electrical impulse. Two frog hearts were isolated into two separate dishes with physiological solution. In one heart, he kept the vagus nerve attached. When stimulated, the vagus nerve causes the heart rate and force to slow down. Therefore, he stimulated the heart multiple times until the slowing was significant. He took the solution from the slowed heart and transferred it to the heart lacking a vagus nerve.
