Multiple Choice
Casey is taking a new medication that blocks potassium channels. What stage of an action potential would be MOST affected by this drug?
2170
views
46
rank
11. Nervous Tissue and Nervous System
Action Potentials
Multiple Choice
Which of the following is characteristic of an action potential?
A
absent of positive feedback
B
voltage-gated ion channels
C
occurs in the dendrites and cell body
D
travels a short distance
Verified step by step guidance1
Understand that an action potential is a rapid rise and fall in voltage or membrane potential across a cellular membrane.
Recognize that action potentials are primarily associated with the axon of a neuron, not the dendrites or cell body.
Identify that action potentials involve voltage-gated ion channels, which open in response to changes in membrane potential.
Note that action potentials are characterized by a positive feedback loop, where the initial depolarization leads to further depolarization.
Remember that action potentials can travel long distances along the axon, unlike graded potentials which travel short distances.
Related Videos
Related Practice
