tone, twitch, types and titles. twitch force and endurance depend on fast twitch (white)-low...
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Tone, Twitch, Types and Titles
Twitch
• Force and Endurance depend on…• FAST twitch (white)-low myoglobin• *fast, powerful contractions (eye movement, fingers)• *fatigue quickly• SLOW twitch (red)-high myoglobin• *extended contractions (postural muscles)• *slow to fatigue• Intermediate-both—calf muscle, sprint or stand
•
Energy and ATP
• Aerobic-OXYGEN• *wasteCarbon dioxide and Water vapor
• Anaerobic –NO oxygen• *waste Lactic acid• Muscle FATIGUE-build up of lactic acid or lack
of ATP
How were these muscles named?
• Occipitofrontalis• Orbicularis oculi• Sternocleidomastoid• Transverse abdominis• Rectus abominis• Deltoid• Pectoralis major• Flexor carpi radialis
Muscle contraction
• 1. Ca+ diffuses across the sarcolemma into SR• 2. Troponin and tropomysin move away from
binding sites• 3. actin heads attaches to myosin strand• 4. actin head moves to center of sarcomere
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