Your answer c The threshold for the second action potential will be higher

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Your answer : c. The threshold for the second action potential will be higher (requiring a larger depolarization). Stop & Think Questions: Threshold can be defined as the minimum voltage needed to generate an action potential. Is the threshold for the first action potential the same as, or different from, the threshold for the second action potential with a 60 msec interval? You correctly answered: a. The threshold for the first action potential is lower than the threshold for the second action potential. Experiment Data: Interval Between Stimuli (msec) Stimulus Voltage (mV) Second Action Potential? 250 20 Yes 125 20 Yes 60 20 No 60 25 No 60 30 Yes 30 30 No 30 35 No 30 40 No 30 45 Yes 15 60 Yes 7.5 60 Yes 3.75 60 No
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12/08/19 page 9 Post-lab Quiz Results You scored 100% by answering 5 out of 5 questions correctly. 1. What is the original threshold for this neuron? You correctly answered: a. A 20 mV depolarization to -50 mV. 2. As the interval between stimuli decreases, the depolarization needed to generate the second action potential You correctly answered: a. increases. 3. Judging from your results, what time period after the first action potential best describes the relative refractory period (the time when a second action potential can be generated only if the stimulus intensity is increased)?

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• Spring '19
• 2 Second, Alexia Reynoso

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