Skeletal muscle worksheet

1. What percent of the body is smooth muscle? Striated muscle?
40% striated, 5% to 10% smooth

2. Name three types of muscle proteins what is the function of each?
Answer: stroma protein- constitutes about 1/5 of the muscle protein. It functions solely as an inert structural element, or skeleton to hold structures in place.

Cellular proteins- also comprise about 1/5 of the muscle protein it is not a muscle.

Contractile proteins- Two types of protein myosin and actin, the constitute 35% and 15% of the total muscle.

3. What is myofibril
Answer: longitudinal striations in the muscle, form transverse striations in the muscle.



4. Name the two filaments that make up a sacromere.
Answer: thin, thick

5. What is the sliding filament theory?
Answer: Cross bridges

6. Muscle relaxation ensues upon the removal of what?
Answer: Calcium ions.