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| 1 | |
What was the conduction velocity of the CAP at 22° C? |
| | A) | About 40 m/s. |
| | B) | Between 25 and 35 m/s. |
| | C) | Between 15 and 20 m/s. |
| | D) | About 10 m/s. |
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| 2 | |
What was the conduction velocity of the CAP at 10° C? |
| | A) | About 40 m/s. |
| | B) | Between 25 and 35 m/s. |
| | C) | Between 15 and 20 m/s. |
| | D) | About 10 m/s. |
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| 3 | |
What was the effect of cooling on the duration (width) of the CAP? |
| | A) | Cooling increased the duration of the CAP. |
| | B) | Cooling did not change the duration of the CAP. |
| | C) | Cooling decreased the duration of the CAP. |
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| 4 | |
What was the effect of cooling on the time delay between the shock and the CAP? |
| | A) | Cooling decreased the time delay. |
| | B) | Cooling did not change the time delay. |
| | C) | Cooling increased the time delay. |
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| 5 | |
What was the effect of cooling on the conduction velocity of the CAP? |
| | A) | Cooling decreased conduction velocity. |
| | B) | Cooling did not change the conduction velocity. |
| | C) | Cooling increased conduction velocity. |
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| 6 | |
What is the effect of cooling on the rate of enzymic action? |
| | A) | Cooling decreases the rate of enzymic action. |
| | B) | Cooling does not change the rate of enzymic action. |
| | C) | Cooling increases the rate of enzymic action. |
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| 7 | |
Ion channels and enzymes are both proteins. If cooling decreases the rate of enzymic activity, what does cooling do to the rate that channels open and close? |
| | A) | Cooling increases the rate that channels open and close. |
| | B) | Cooling does not change the rate that channels open and close. |
| | C) | Cooling decreases the rate that channels open and close. |
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| 8 | |
If channel opening and closing are temperature sensitive, what do you think happens to the rate of membrane potential change when the nerve is cold? |
| | A) | The channels open and close slower in the cold, so the resultant membrane potential change takes place slower. |
| | B) | The channels open and close slower in the cold, so the resultant membrane potential change takes place faster. |
| | C) | The channels open and close slower in the cold, but this should not affect the rate of membrane potential change. |
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| 9 | |
If cooling slows channel function and membrane potential changes, what will be the effect of cooling on the time course (duration) of the action potential? |
| | A) | The time course of the action potential will be decreased. |
| | B) | The time course of the action potential will be increased. |
| | C) | The time course of the action potential will not be changed. |
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| 10 | |
If cooling increases the time taken for the membrane to come to threshold and produce a spike, what will be the effect of cooling on the time taken for the action potential transmission from node to node in a myelinated axon? |
| | A) | Cooling increases the time for spikes to travel between nodes, so conduction velocity will be slower. |
| | B) | Cooling increases the time for spikes to travel between nodes, so conduction velocity will be faster. |
| | C) | Cooling increases the time for spikes to travel between nodes, but this will not affect the conduction velocity of the action potential down the axon. |
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