2. What happens to each of the following when a muscle contracts? Width of dark band:
Width of light band:
Distance between Z lines:
Total length of sarcomere:

Which of the following processes does the body not use protein to perform? a. repairing muscles b. producing hormones c. making hemoglobin d. creating amino acids

How does social isolation affect teens?

If you were running a marathon, which type of muscle fibers would be most useful to you? a. slow-twitch b. fast-twitch, type i a c. intermediate-twitch, type ii b d. slow-intermediate twitch, type i b select the best answer from the choices provided. a b c d