1.What percent of the body is smooth muscle? Striated muscle?
40% is striated muscle and 5% to 10% is smooth muscle
2.Name 3 types of muscle proteins. What is the function of each?
Stroma - an inert structural element, or skeleton, to hold the rest of the structures in place.
Cellular - they are not specifically characteristic of muscle since they are also found in other metabolically active cells.
Contractile - tow types pf protein, myosin and actin, are essential for contraction.
3.What is a myofibril?
independent elements, each having a cylindrical geometry, which run the length of tge muscle fiber.
4.Sketch a picture of a sarcomere. Label the I-band, the A-band, the Z-line and the H-zone.
5.Name the two filaments that make up a sarcomere.
Thick filament and thin filament
6.Draw a sarcomere at rest, stretched out and contracted.
7.What is the sliding filament theory?
The observations of the changes in the banding pattern during contraction have led to what is known as the "Sliding filament theory of muscle contraction".
8.Muscle relaxation ensues upon the removal of what?
calcium ions
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1 comment:
Good, but missing sketches
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