Lecture 19 Nervous and musculoskeletal posted

Lecture 19 Nervous and musculoskeletal posted - filaments...

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BIO 311D LECTURE 19 Nervous system
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Our nervous system receptor integration center effector sensory Sensory input CNS Motor output Muscle or gland cells in PNS
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Neurons Membrane potentials Action potential (Nerve impulse) Travel of the signal along an axon Chemical synapses Muscle movement
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Neurons
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Membrane potential Resting potential = -70 mV
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Graded potentials and an action potential
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Travel of the signal along an axon
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Chemical synapses
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Muscle movement Contraction Muscles span joints Flexors and extensors
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Muscle tissue Muscle fibers Myofibrils Myofilaments – thin
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Unformatted text preview: filaments (actin), thick filaments (myosin) Myofibrils sarcomeres A band, I band, M line, H zone, Z line The sliding-filament model Contraction Muscle at rest – Muscle ready to contract – Summary Frequency of action potentials Control of muscle contraction Differing motor units Website http://www.brookscole.com/chemistry_d/templates/studen Website http://www.blackwellpublishing.com/matthews/animate.html Website http://highered.mcgraw-hill.com/sites/0072437316/student_view0/cha...
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This note was uploaded on 03/06/2010 for the course BIOL 50755 taught by Professor Allgeier during the Spring '10 term at University of Texas-Tyler.

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Lecture 19 Nervous and musculoskeletal posted - filaments...

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