Content Frame
Note for screen reader users: There is text between the form elements on this page. To be sure that you do not miss any text, use item by item navigation methods, rather than tabbing from form element to form element
[Skip Breadcrumb Navigation]

Nervous System I: The Action Potential

Interactive Physiology® Quiz: Nervous System I: The Action Potential

This activity contains 10 questions.

Question 1
1 The action potential is a transient change in the resting membrane potential from -70 mV to +30 mV, then back to -70 mV. This change is caused by the opening of first _____ then _____ voltage-gated channels.
End of Question 1

Question 2
2 What area(s) of the neuron generate signals that open the voltage-gated channels in the first part of the axon, thus causing an action potential?
End of Question 2

Question 3
3 As the axon hillock depolarizes, Voltage-gated Na+ channels open and Na+ moves (into or out of) __________ the cell causing further (depolarization or repolarization) __________.
End of Question 3

Question 4
4 If depolarization reaches -55 mV, an action potential will be generated. What is this -55 mV trigger point called?
End of Question 4

Question 5
5 At the end of the depolarization phase, what voltage-gated channels open to help restore the resting membrane potential?
End of Question 5

Question 6
6 Repolarization is caused by the movement of what ion (sodium or potassium), in what direction (into or out of the cell)?
End of Question 6

Question 7
7 After an action potential, the membrane becomes more negative than -70 mV. This period is called:
End of Question 7

Question 8
8 After a neuron has generated an action potential, it cannot generate another one for a while. This period is called:
End of Question 8

Question 9
9 The fastest conduction of an action potential would occur in an axon with which of the following characteristics?
End of Question 9

Question 10
10 What is the name of the disease in which the myelin sheaths of central nervous system axons are destroyed?
End of Question 10

Clear Answers/Start Over

Answer choices in this exercise appear in a different order each time the page is loaded.

Copyright © 1995 - 2014 Pearson Education . All rights reserved.
Legal Notice | Privacy Policy | Permissions

[Return to the Top of this Page]