Muscle Tissue

4. Phase lasting 10-100ms, due to pumping of calcium back into SR; muscle tension decreases to zero and tracing returns to baseline
8. Principle of _______ : body adapts after rest and becomes stronger
9. Muscle tone: number of motor units stimulated even when the muscle is at rest
12. Direct _________:First 15 seconds of short intense exercise, generates 1 ATP per creatine
14. Phase of cross bridges are active, from the onset to peak of tension development and myogram tracing rises to a peak; lasts 10-100ms
16. ______ contributes to muscle fatigue by building up in the blood after high intensity exercise
18. Affected by four factors: Frequency of stimulation, Number of muscle fibers recruited, Size of muscle fibers, Degree of muscle stretch
19. When muscle tension developed overcomes load and muscle shortening occurs

1. When muscle lengthens under tension, ex) lowering a weight
2. The pathway used in short intense exercise uses glycolysis, which converts glucose to lactic acid, 30-40 seconds, 2 ATP per glucose
3. Greater ________ requires more muscle fibers recruited
5. Resistance opposing contraction
6. Phase of first few milliseconds following stimulation, cross bridges begin to cycle but muscle tension is not yet measurable
7. Lactic acid gets recycled back to _____ to recover a fatigued muscle
10. Response of a muscle to a single stimulation Muscle fiber contracts quickly, then relaxes
11. When muscle tension develops but load is not moved
13. ____ Exercise leads to Muscle hypertrophy, Increased mitochondria, myofilaments, glycogen stores, and connective tissue, Increased muscle strength and size
15. Eccentric and Concentric muscle contractions are _________
17. The pathway used in prolonged periods of exercise, lasts for hours, uses oxygen, produces 32 ATP per glucose, CO2 and H2O