lecture 6 - Cranial nerves arise in brain Spinal nerves...

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Cranial nerves – arise in brain Spinal nerves part of peripheral nervous system Sensory nerves part of peripheral system What is a nerve? Collection of cell processes, mainly axons Bulge – is where number of cell bodies is located (ganglion) Peripheral Somatic nervous system o Sensory (afferent) nerves – carry in o Motor (efferent) nerves – carry away Autonomic nervous system – involuntary (controlling bodily systems) things other than skeletal muscles o Sensory (afferent) nerves Carrying impulses from body organs to brain Information about the internal environment (may not be conscious of, but still going to brain and being evaluated) o Motor (efferent) nerves – controlling the way body functions Most organs are regulated by both sympathetic and parasympathetic control Sympathetic – activities related to fight or flight Mostly turn things on Increases heart rate, respiration Turns off or slows down digestive system Arise from the middle of spinal cord Parasympathetic – associated with more restful effects Slow down heart rate, respiration Speeds up digestion Arise from brain or lower region of spinal cord Somatic system Reflex Are Receptor
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This note was uploaded on 04/08/2011 for the course BIOLOGY 109:102 taught by Professor Martin during the Spring '11 term at Rutgers.

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lecture 6 - Cranial nerves arise in brain Spinal nerves...

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