PEX-03-04 - Correct answer: c. be compressed in time but...

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Exercise 3: Neurophysiology of Nerve Impulses: Activity 4: The Action Potential: Importance of Voltage-Gated Na+ channels Lab Report Pre-lab Quiz Results You have not completed the Pre-lab Quiz. 12/07/11 page 1
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12/07/11 page 2 Experiment Results Predict Question: Predict Question 1: If you apply TTX between recording electrodes R1 and R2, what effect will the TTX have on the action potentials at R1 and R2? Your answer : b. TTX will block the response at R1 but have no effect at R2. Predict Question 2: If you apply lidocaine between recording electrodes R1 and R2, what effect will the lidocaine have on the action potentials at R1 and R2? Your answer : b. Lidocaine will block the response at R1 but have no effect at R2. 2. Enter the peak value of the response at R1 and R2 in the field below and then click Submit to record your answer in the lab report. You answered: 100 μV With a slower timescale, the appearance of the action potentials generated at R1 and R2 will appear to Your answer : b. occur more slowly and have a larger peak value of response.
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Unformatted text preview: Correct answer: c. be compressed in time but have the same peak value of response. Why do you think TTX is not used during dental procedures? Your answer : a. TTX cannot be applied to axons in or near the mouth cavity. Correct answer: c. TTX irreversibly blocks voltage-gated sodium channels in axonal membranes. Experiment Data: Condition Stimulus Voltage (mV) Electrode Peak Value of Response (μV) 2 sec Peak Value of Response (μV) 4 sec Peak Value of Response (μV) 6 sec Peak Value of Response (μV) 8 sec Peak Value of Response (μV) 10 sec Control 30 R1 100 100 100 100 100 Control 30 R2 100 100 100 100 100 TTX 30 R1 100 100 100 100 100 TTX 30 R2 100 100 Lidocaine 30 R1 100 100 100 100 100 Lidocaine 30 R2 100 100 100 12/07/11 page 3 12/07/11 page 4 12/07/11 page 5 Post-lab Quiz Results You have not completed the Post-lab Quiz. 12/07/11 page 6 Review Sheet Results You have not completed the Review Sheet....
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This note was uploaded on 02/06/2012 for the course ZOOL 2304 taught by Professor Gollahon during the Fall '11 term at Texas Tech.

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PEX-03-04 - Correct answer: c. be compressed in time but...

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