Question 1
The function of the titin protein is to
◦ release calcium during contraction.
◦ stabilize the position of the contractile filaments.
◦ pull Z lines together during contraction.
◦ cover the myosin binding site on the actin molecule.
◦ interact with actin during contraction.
Question 2
When a skeletal muscle generates enough force during contraction to shorten,
◦ the sarcomere and the I band will shorten.
◦ only the sarcomere will shorten.
◦ the sarcomere, the A band, and the I band will shorten.
◦ only the I band will shorten.
◦ only the A band will shorten.