Chapter 5- Muscle Strength and Endurance

Chapter 5 Muscle - Chapter 5 Muscular strength and endurance 3 different types of muscles 1 Skeletal voluntary We have control over i t Strength

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Chapter 5 Muscular strength and endurance 3 different types of muscles 1. Skeletal- voluntary. We have control over it. Strength and endurance 2. Cardiac muscle- involuntary. only found in heart. Allows heart to pump 3. Smooth- involuntary. in the internal muscles. What helps move food through our GI tract. Skeletal Muscle o Each skeletal muscle is surrounded by a sheet of connective tissue called tendons. o Tendon attaches muscles to bone o Within each muscle, there are muscle fibers. o Inside muscles fibers, they are made up of myrfibrils. 2 contactile proteins called actin and myosin. Protein strands that slides back and forth to allow muscle to contract o 2 types of muscle fibers 1. Slow-twitch- contract slowly over time. Require oxygen for contraction. 2. Fast twitch-contract quickly and forcefully. They fatigue very quickly. o Depends on the individual muscle to determine whether or not there are slow twitch or fast twitch. Depends on the job that the muscles have to do o
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This note was uploaded on 02/05/2011 for the course KIN 2504 taught by Professor Stone during the Spring '08 term at LSU.

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Chapter 5 Muscle - Chapter 5 Muscular strength and endurance 3 different types of muscles 1 Skeletal voluntary We have control over i t Strength

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