Muscle Physiology

1. a type of muscle contraction that occurs when the muscle lengthens
8. muscle fibre types best for endurance activities (e.g. marathon)
9. a structure that keeps tropomyosin over active binding sites on actin and binds to calcium when the muscle contracts
10. a type of muscle contraction that occurs when the muscle shortens in length
12. plasma membrane of skeletal muscle fibres
13. a rod-shaped spiralling protein that blocks the active binding sites for myosin on actin
15. a type of muscle contraction that occurs when the muscle length does not change
16. glucose is the main energy source for this process

2. the energy provided by this process lasts 15 seconds
3. thick filament
4. site of ATP formation for aerobic cellular respiration
5. region of a myofibril between two successive z discs, and is a functional unit of skeletal muscle
6. muscle fibre type with intermediate glycogen stores (e.g. used for sprints)
7. red pigment that stores oxygen, similar to haemoglobin
11. the rate of fatigue of slow oxidative muscle fibres
14. thin filament