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RCS Anat 5-6 Review
Rosehill Anatomy Modules 5 and first half of Module 6
| Question | Answer |
|---|---|
| motor unit | one neuron and all the skeletal muscle cells it stimulates |
| motor end plate | the position on the muscle cell where the nerve cell "connects" |
| snaptic gap | the gap between the nerve ending and the muscle cell |
| acetylecholine | When a nerve impulse reaches the nerve ending, this is released. |
| action potential | The electrical current generated along the muscles cell membrane is called an ___, and is the signal for the muscle cell to contract. |
| Contraction | the action of a muscle cell after is receives a signal |
| twitch contraction | When a single message causes a single contraction |
| tetanus | When contraction is prolonged, or fused, ? has occurred. |
| slow-twitch | Muscle fibers that use small amounts of energy and are resistant to fatigue can contract for many hours. They are termed _____ muscle fibers. |
| fast-twitch | Muscle fibers that use large amounts of energy and do the most powerful movements fatigue more quickly. They are termed _____ muscle fibers. |
| cellular respiration | Most energy for mucle contraction at rest and with light exercise if provided by the process of ___, using glucose or other nutrient source. |
| creatine phosphate | short term supplies of ATP are provided for by phosphorylation, using ___ _____; this lasts only about 20 sec. |
| oxygen debt | With intense exercise, ___ ___ and lactic fermentation occurs. This leads to fatigue and cramps in the muscle. |
| cramps | ____ in the muscle is caused by oxygen debt and lactic fermentation. They will go away as activity slows down. |
| concentric | Muscle contractions in which the muscle shortens are called ____ contractions; (most people think of these as "normal.") |
| eccentric | If the muscle actually slowly lengthens, for instance, when the load is too heavy, the contractions are called ____. |
| isometric | muscle contractions in which the muscle length stays the same are called _____ |
| origin | The end that is stationary when the muscle contracts is the ____. |
| insertion | The end of the muscle that moves is the ___. |
| flexion | Bending at a joint is called ___. |
| extension | Straightening your joint is called ___. |
| prime mover | muscle that is most involved in any speific action |
| antagonist | muscles that oppose the action of another muscle |
| synergist | muscles taht help the action of another are called ___. |
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