What exactly causes the depolarization phase of an action potential? K+ being pumped into the cell by the sodium-potassium ATPase K+ leaving the cell through voltage-gated channels Na+ being pumped into the cell by the sodium-potassium ATPase Na+ entering the cell through voltage-gated channels Opening of the Na+ channel inactivation gate
Added by Alba H.
Close
Step 1
Step 1: The depolarization phase of an action potential is caused by sodium entering the cell through voltage-gated channels. Show more…
Show all steps
Your feedback will help us improve your experience
Mystique Till and 100 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
How is the majority of the potassium ions kept inside the cell of a neuron, flowing against its concentration gradient, when the cell is at its resting potential? What are the stages of an action potential from beginning to end? How is the threshold met, which then causes the Na+ channels to open?
Madhur L.
Please outline the process of action potentials in neurons starting with what causes the initial depolarization, what's happening to voltage-gated Na+ and K+ at each phase of the action potential as in depolarization, repolarization, and hyper-polarization.
Sri K.
Action potentials occur when _____. a. potassium gates close b. a stimulus pushes membrane potential to threshold c. sodium-potassium pumps kick into action d. neurotransmitter is reabsorbed
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD