Question

An Action Potential is accompanied by: (1) Cell's interior becoming positive (22) Cell's interior becoming negative (3) Change from gray matter to white matter (4) Change from white matter to gray matter

• A. Cell’s interior becoming positive
• B. Cell’s interior becoming negative
• C. Change from gray matter to white matter
• D. Change from white matter to gray matter

Hint:

The cell interior becomes positive.

Answer 1

The Correct Option is A

An action potential, or neuron 'firing,' involves a rapid influx of sodium ions (Na+). This causes the cell membrane's interior to become temporarily positive relative to the outside, a process called depolarization.

• Key event: Sodium ions enter the neuron, reversing membrane potential.
• Result: The cell's interior becomes positive relative to its exterior.
• Significance: Depolarization is vital for transmitting electrical signals along the neuron.