27-5-2021 PhysioEx Exercise 3 Activity 4
PhysioEx Lab Report
Exercise 3: Neurophysiology of Nerve Impulses
Activity 4: The Action Potential: Importance of Voltage-Gated Na+ Channels
Name:
Date:
Session ID:
Pre-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.
1 Voltage-gated Na+ channels are membrane channels that open
You correctly answered: when the membrane depolarizes.
2 When open, Na+ channels allow
You correctly answered: Na+ ions to diffuse into the cell.
3 Which of the following is true of an action potential?
You correctly answered: All of these answers are correct.
4 Which of the following can reduce the likelihood of an action potential?
You correctly answered: All of these can reduce the likelihood of an action potential.
Experiment Results
Predict Questions
1 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: TTX will block the response at R2 but have no effect at R1.
2 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: Lidocaine will block the response at R2 but have no effect at R1.
Stop & Think Questions
1 Enter the peak value of the response at R1 and R2.
You answered: 100 μV.
2 With a slower timescale, the appearance of the action potentials generated at R1 and R2 will appear
to
You correctly answered: be compressed in time but have the same peak value of response.
https://media.pearsoncmg.com/bc/bc_0media_ap/physioex/10/ex3/act4/ 1/4
PhysioEx Lab Report
Exercise 3: Neurophysiology of Nerve Impulses
Activity 4: The Action Potential: Importance of Voltage-Gated Na+ Channels
Name:
Date:
Session ID:
Pre-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.
1 Voltage-gated Na+ channels are membrane channels that open
You correctly answered: when the membrane depolarizes.
2 When open, Na+ channels allow
You correctly answered: Na+ ions to diffuse into the cell.
3 Which of the following is true of an action potential?
You correctly answered: All of these answers are correct.
4 Which of the following can reduce the likelihood of an action potential?
You correctly answered: All of these can reduce the likelihood of an action potential.
Experiment Results
Predict Questions
1 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: TTX will block the response at R2 but have no effect at R1.
2 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: Lidocaine will block the response at R2 but have no effect at R1.
Stop & Think Questions
1 Enter the peak value of the response at R1 and R2.
You answered: 100 μV.
2 With a slower timescale, the appearance of the action potentials generated at R1 and R2 will appear
to
You correctly answered: be compressed in time but have the same peak value of response.
https://media.pearsoncmg.com/bc/bc_0media_ap/physioex/10/ex3/act4/ 1/4
