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A and P Muscle Lab
Lab Quiz
| Question | Answer |
|---|---|
| A larger number of neurons sending signals at the same time is called... | Spatial summation |
| The result of a spatial summation is... | A quick and powerful contraction of several motor units |
| A few neurons sending a high rate of signals to the same group of muscle cells is called... | Temporal summation |
| Temporal summations... | are weaker then spatial but last longer. It involves less electrical activity then spatial. |
| As the frequency of a stimulus increases (more signals from a neuron)... | A particular set of muscle fibers well become tired and eventually become tetanus (locked) |
| Motor Unit | a single α-motor neuron and all of the corresponding muscle fibers it innervates; |
| Threshold Stimulus | The weakest stimulus capable of producing an action potential in an excitable cell. |
| Temporal (or wave) summation | Temporal Summation occurs when the time constant is sufficiently long and the frequency of rises in potential are high enough that a rise in potential begins before a previous one ends. |
| Spatial Summation | Spatial summation is the algebraic summation of potentials from different areas of input, usually on the dendrites. |
| Tetanus | a sustained muscular contraction resulting from a rapid series of nerve impulses |
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