What is the Depolarization phase in neuron signaling?
Unit 32 Signaling within Neurons

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Biology
•
12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
The Depolarization phase is when the neuron's membrane potential becomes less negative (more positive) due to the influx of Na+ ions, leading to the generation of an action potential.
2.
FLASHCARD QUESTION
Front
What is Resting Potential in neurons?
Back
Resting Potential is the state of a neuron when it is not actively transmitting a signal, characterized by a negative charge inside the axon, typically around -70mV.
3.
FLASHCARD QUESTION
Front
What occurs at step #4 in the action potential process?
Back
At step #4, K+ (potassium) channels open, allowing K+ to diffuse out of the neuron, which repolarizes the membrane after depolarization.
4.
FLASHCARD QUESTION
Front
Describe the pathway of action potentials in neurons.
Back
Action potentials run along the axon from the axon hillock to the axon terminals, transmitting signals to other neurons or muscles.
5.
FLASHCARD QUESTION
Front
What charge does the inside of a resting neuron have?
Back
The inside of a resting neuron has a negative charge.
6.
FLASHCARD QUESTION
Front
What is the role of Na+ ions during depolarization?
Back
Na+ ions rush into the neuron during depolarization, causing the membrane potential to become more positive.
7.
FLASHCARD QUESTION
Front
What is the significance of the threshold potential?
Back
The threshold potential is the critical level to which a membrane must be depolarized to initiate an action potential.
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