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NFPT Ch.3
Skelatal Muscle Structure and Function
Question | Answer |
---|---|
What is the Epimysium? | An elastic, connective, fibrous tissue surrounding an ENTIRE muscle group or motor unit. |
What is the Perimysium? | A connective tissue surrounding a BUNDLE of muscles or motor unit. |
What is the Endomysium? | A connective tissue surrounding EACH muscle cell fiber. |
True or False. You can shape a muscle with proper exercises. | FALSE. Muscle shape is genetically predetermined and cannot be shaped. Yes a muscle will and can get bigger, but shaping is not possible. |
A person with a predominance of White Fast Twitch motor units would be best suited for events including.. | Speed and Strength. |
A person with a predominance of Red Fast Twitch motor units would be best suited for events including.. | Stamina. |
A person with a predominance of Red Slow Twitch motor units would be best suited for events including.. | Endurance. |
You are training in the 20-25 rep range. You start feeling lactic acid building up and your muscles are fatiguing.. What is the order of recruitment of the 3 motor units? | Red Slow Twitch, Red Fast Twitch, and White Fast Twitch. (Depleting Energy Recruitment) |
What Motor Unit has the greatest potential for growth? | White Fast Twitch Motor Units. |
The instant involvement of varying motor units is called.. | Immediate Recruitment. |
Contractile Speed Recruitment is.. | Based on the speed of contraction. A maximum contraction against a sub-maximal resistance will in theory, call on the red and white fast twitch motor units. |
True or False. Strict isolation of a muscle is an anatomical impossibility. | True. Muscles work in teams. NEVER alone! |
Why is a cell impermeable during a contraction? | ... |