front 1 In the myofibril the protein that possesses the active site for myosin heads to bind is called
| back 1 G actin |
front 2 The type of contraction where the tension is less than the load is called
| back 2 isotonic concentric contraction |
front 3 During the time when the action potential moves through the sarcolemma a muscle twitch is in _________.
| back 3 latent period |
front 4 Detachment of myosin cross-bridges occurs during the __________.
| back 4 relaxation phase |
front 5 In the sarcomere which elastic protein attaches thick filament to the Z line?
| back 5 titin |
front 6 Which of the following is not true of acetylcholine?
| back 6 it enters the muscle fiber to release calcium form the sarcoplasmic reticulum |
front 7 Put the following events of excitation-contraction coupling in the order in which they occur. 1. Excitation 2. Sarcomere shortening 3. Generation of muscle tension 4. Neural control 5. Contraction cycle begins 6. Release of calcium ions A) 4,1,5,2,6,3 | back 7 4,1,6,5,2,3 |
front 8 Which of the following statements about excitation-contraction
coupling is incorrect? | back 8 Calcium ions travel through the transverse tubule. |