What percent of the body is smooth muscle? Striated muscle?
5% to 10% is smooth or cardiac muscle. 40% is striated muscle.
Name 3 types of muscle proteins. What is the function of each?
*Stroma protein- skeleton, to hold the rest of the structures in place.
*Cellular proteins- Compromise about 1/5 of the muscle protein (enzymes).
*Contractile proteins- Are essential for contraction. They constitute 35% and 15% of the total muscle protein, respectively.
What is a myofibril?
An independent cylindrical element, A single muscle cells. Responsible for banding pattern.
Sketch a picture of a sarcomere. Label the I-band, the A-band, the Z-line and the H-zone.
On a separate piece of paper.
Name the two filaments that make up a sarcomere.
The thick filament- composed of myosin molecules
Also the thin filament- composed of actin, troponin, and tropomyosin.
Draw a sarcomere at rest, stretched out and contracted.
On a seperate piece of paper.
What is the sliding filament theory?
* The state of contraction
Muscle relaxation ensues upon the removal of what?
* Calcium ions
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1 comment:
Good job!! I am missing your sketches. You might have turned them in and I have not graded them, but if not, make sure that you turn them in.
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