Question

1.

Muscle fibers require ATP to contract and relax. Which of the following is way that ATP may be supplied to muscle cells?

a.ATP is generated by oxidative phosphorylation.

b.ATP is stored in tendons.

c.ATP is generated by glial cells

d.ATP is supplied by the circulatory system.

2.

If you had a muscle cell with a relatively low number of Ca2+ ATPase pumps in its sarcoplasmic reticulum, you would expect that the muscle fiber would:

		a.Contract more quickly than other similar muscle fibers.
		b.Contract more slowly than other similar muscle fibers.
		c.Relax more slowly than other similar muscle fibers.
		d.Relax more quickly than other similar muscle fibers.