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Exercise 3: Neurophysiology of Nerve Impulses Activity 9: The Action Potential: Putting It All Together
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Exercise 3: Neurophysiology of Nerve Impulses Activity 9: The Action Potential: Putting It All Together
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27-5-2021 PhysioEx Exercise 3 Activity 9PhysioEx Lab Report
Exercise 3: Neurophysiology of Nerve Impulses
Activity 9: The Action Potential: Putting It All Together
Name:
Date
Session ID:
Pre-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.
1 Sensory neurons respond to an appropriate sensory stimulus with a change in membrane potential
that is
You correctly answered: graded with the stimulus intensity.
2 If the depolarization that reaches the axon is large and suprathreshold, the result in the axon is
You correctly answered: action potentials at higher frequency.
3 At the axon terminal, each action potential causes the release of neurotransmitter. This
neurotransmitter diffuses to the receiving end of an interneuron, where it binds to receptors and
causes
You correctly answered: ion channels to open, so that the receiving end of the interneuron
depolarizes.
4 Interneurons respond to chemical (neurotransmitter) stimulation with a change in membrane
potential that is
You correctly answered: graded with the stimulus intensity.
Experiment Results
Predict Questions
1 Predict Question 1: If you apply a very weak, subthreshold stimulus to the sensory receptor
Your answer: a small, depolarizing response will occur at R1, and no responses will occur at R2, R3,
and R4.
2 Predict Question 2: If you apply a moderate stimulus to the sensory receptor
Your answer: a small, depolarizing response will occur at R1 and R2, and action potentials will occur at
R3 and R4.
3 Predict Question 3: If you apply a strong stimulus to the sensory receptor
Your answer: a large, depolarizing response will occur at R1 and R3, and action potentials will occur at
R2 and R4.
https://media.pearsoncmg.com/bc/bc_0media_ap/physioex/10/ex3/act9/ 1/3
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