KP222 Chapter Notes - Chapter 11.1: Grey Matter, Medulla Oblongata, Adrenal Medulla
30 Sep 2016
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Kp222 chapter 11 the nervous system: autonomic and motor. Definition: the part of the nervous system that encompasses efferent neurons that synapse with and regulate the function of integral organs and other structures not under voluntary control. Occurs at a subconscious level (you don"t have to think about making your heart beat, the ans makes it beat for you) Dual innervation in the autonomic nervous system: most organs have 2 branches of the autonomic nervous system. One branch controls sympathetic function (fight-or-flight), the other controls parasympathetic function (rest and digest) Anatomy of the autonomic nervous system: consists of 2 types of neurons arranged in a row: One for communication from the cns (central nervous system) One for communication to the effector organ. Postganglionic neurons: 2 neurons communicate through synapses called autonomic ganglia, a single preganglionic neuron generally forms synapses with multiple postganglionic neurons. Short preganglionic neuron synapsing with postganglionic neuron in sympathetic ganglia.
