Question 1
Which is a characteristic of slow-twitch oxidative skeletal muscle fibers?
◦ long contraction duration only
◦ few mitochondria only
◦ long contraction duration, few mitochondria, and high capillary density
◦ long contraction duration and high capillary density
◦ high capillary density only
Question 2
The speed with which force is developed by skeletal muscles is determined by the
◦ Ca
2+ ATPase activity and sarcoplasmic calcium concentration.
◦ Ca
2+ ATPase activity.
◦ sarcoplasmic calcium concentration.
◦ Ca
2+ ATPase activity, myosin ATPase isoform, and sarcoplasmic calcium concentration.
◦ myosin ATPase isoform.