| A | B |
|---|
| What ion flows into the cell when ACh receptor gates open? | Sodium |
| What kind of muscle contraction results with a force greater than the resistance? | Isotonic and concentric |
| Cell respiration requires an ample supply of what two chemicals? | oxygen and glucose |
| During which period of a muscle twitch do the sacromeres shorten and the actin filaments slide toward the H zone? | Period of contraction |
| What are the components of a triad? | sarcoplasmic reticulum, cristernae and T-tubules |
| Muscle contraction occurs when what filaments slide toward the center of the sacromere? | Actin filaments |
| The release of what chemical from the sarcoplasmic reticulum reacts with tropinin to clear tropomyosim away from myosin binding sites? | Calcium |
| By what process does the body generates ATP and repay its oxygen debt? | Aerobic cellular respiration |
| What is the protein which is held in place on actin by the protein troponin? | Tropomyosin |
| What develops as lactic acid accumulates that is paid back by aerobic respiration? | Oxygen debt |
| What is the conractile response of a single muscle fiber or motor unit to a threshold stimulus? | Twitch |
| What are the product of cellular respiration? | Heat, CO2, H2O, ATP |
| A cordlike extension of connective tissue beyond the muscle, serving to attach it to the bone? | Tendon |
| Myosin is in the "active and ready position" or "cocked" when _____ and ____ are attached to the globular head? | ADP + Pi |
| ______ gates are located in the sarcolemma of muscle fiber. | Acetylcholine and Voltage |
| Will contraction be stronger or weaker if the muscle has been stretched or shortened? | Weaker |
| What chemical is found in the muscles that stores oxygen supplies to the mitochondria? | Myoglobin |
