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This 1 page One Day of Notes was uploaded by Leslie Richardson on Monday January 26, 2015. The One Day of Notes belongs to a course at a university taught by a professor in Fall. Since its upload, it has received 93 views.
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Date Created: 01/26/15
Motor unit the ratio of muscle bers innervated by a single motor nerve is not determined by the size of the muscle but rather by precision accuracy amp coordination of its movement Strength gradations 0 Multiple motor unit summation Wave summation o Tetanus Sketch in camera les 0 This is happening in one muscle ber one muscle cell quotall or nonequot wave of depolarization wave summation sum of 2 waves of depolarization tetanus max tension then immediate fatigue wave summation working harder than normal OOOOO Dendrites how nerves communicate with other nerves Myelin sheath hot dogs fatty substance that surrounds the axon speeds things up Nodes of Ranvier where hot dogs link together Myelinated nerves are much faster 3 basic functions of the nervous system 1 Excitability 2 Conduction 3 Integration amp regulations central nervous system brain amp spinal cord CNS Noci receptors pain receptors efferent motor nerve ber afferent sensory never ber motor makes a car go motor nerve makes a muscle contract Waves of Depolarization involves sodium amp potassium ions