BIO210Y5 Lecture Notes - Lecture 8: Peripheral Nervous System, Somatic Nervous System, Axon Hillock

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18 Feb 2016
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Nervous system is divided into two main divisions. Peripheral nervous system is a lot of the nerves that we"ve already talked about (anything that doesn"t belong in central nervous system) Telling your muscles how to move are your somatic/external. Sensory afferent pns division signals are sent from peripheral to central part of the body (the brain) Neurons sending information to what needs to act are called efferent from brain to peripheral. Most of the nerves we"ve talked about were part of the somatic nervous system and the muscles were the effectors. The visceral or autonomic nervous system is like your heart beating (automatic, you don"t control it) Peripheral nervous system is really starting in about l2-l4 and then extending further into sacral. Presynaptic cell because that"s where the signal will be initiated. Axon hillock is important for how the signal is generated. The axon is responsible for transmitting the signal. Postsynaptic cell gets the message from the presynaptic cell.

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