Chpt 10 & 11 Muscular Tissue part 2

Chpt 10 & 11 Muscular Tissue part 2 - Recruitment and...

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Unformatted text preview: Recruitment and Stimulus Intensity 11-1 S m a lle s t to la rg e s t 11-2 Twitch and Treppe Contractions 11-3 Incomplete and Complete Tetanus Higher frequency stimulation (20-40 stimuli/second) generates gradually more strength of contraction each stimuli arrives before last one recovers temporal summation or wave summation Maximum frequency stimulation (40-50 stimuli/second) 11-4 Length-Tension Curve 11-5 Figure 11.15a 11-6 Figure 11.15b 11-7 Figure 11.15c 11-8 Muscle Contraction Phases Isometric and isotonic phases of lifting tension builds though the box is not moving muscle begins to shorten tension maintained 11-9 ATP Sources All muscle contraction depends on ATP Pathways of ATP synthesis anaerobic fermentation (ATP production limited) aerobic respiration (more ATP produced) 11-10 Immediate Energy Needs 11-11 Short-Term Energy Needs Glycogen-lactic acid system takes over produces ATP for 30-40 seconds of maximum activity 11-12 Long-Term Energy Needs Aerobic respiration needed for prolonged exercise Produces much more ATP. 11-13 Skeletal Muscle Fiber Characteristics Type I Slow-Twitch Oxidative (SO) slow slow small high low TYPE IIA Fast-Twitch Oxidative Glycolytic (FOG) fast intermediate intermediate high high intermediate Type IIB Fast-Twitch Glycolytic (FG) fast fast large high low high 11-14 CHARACTERISTIC Contraction Speed Fatigue rate Diameter Mitochondrial concentration Glycolytic enzyme concentration ATPase concentration low Force-Velocity Relationship FT Tension ST Velocity 11-15 Strength and Conditioning Strength of contraction Resistance training (weight lifting) Endurance training (aerobic exercise) 11-16 ...
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This note was uploaded on 04/07/2008 for the course BIO 103 taught by Professor Washington during the Fall '08 term at University of Evansville.

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Chpt 10 & 11 Muscular Tissue part 2 - Recruitment and...

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