What is the nature of an action potential?

Action Potential Quiz

Quiz
•
Science
•
University
•
Easy
James Mancinelli
Used 5+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
It is a graded event.
It is an all-or-nothing event.
It is a reversible event.
It is a slow event.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What primarily causes the inside of a neuron to be negatively charged at resting membrane potential?
Presence of positively charged ions inside
Presence of negatively charged ions outside
Presence of negatively charged ions inside
Absence of ions inside
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What must a neuron receive to initiate an action potential?
A weak stimulus
A threshold stimulus
A random stimulus
A continuous stimulus
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens when the threshold stimulus is reached in a neuron?
Sodium channels close
Potassium channels open
Voltage-gated sodium channels open
Calcium channels open
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What phase is characterized by the rapid influx of sodium ions into the neuron?
Repolarization
Depolarization
Refractory period
Propagation
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What occurs during the repolarization phase of an action potential?
Sodium ions flow into the cell
Potassium ions flow out of the cell
Calcium ions flow into the cell
Chloride ions flow out of the cell
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the refractory period?
The period when the neuron can generate another action potential immediately
The period when the neuron cannot generate another action potential
The period when the neuron is at rest
The period when the neuron is hyperactive
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