Peraza: Unit 6 - Nervous System - Part 2

Front

What is the normal resting potential of a neuron cell membrane?

Back

-70mV

Front

What is an electrical impulse within a single neuron called?

Back

action potential

Front

What stage are both ions present in large concentrations INSIDE the neuron?

Back

Depolarization

Front

When is the potassium channel open?

Back

during repolarization only

Front

True or False: Hyperpolarization during an action potential is due to the slow closing of the voltage-gated K+ channels.

Back

TRUE

Front

Define Depolarization.

Back

The process during which the membrane potential becomes less negative (more positive) than the resting potential.

Front

Define Repolarization.

Back

The process of returning the membrane potential to its resting state after depolarization.

Front

What role do voltage-gated Na+ channels play during an action potential?

Back

They open during depolarization, allowing Na+ ions to flow into the neuron.

Front

What is Hyperpolarization?

Back

An increase in the membrane potential, making it more negative than the resting potential.

Front

What is the significance of the -70mV resting potential?

Back

It is the baseline state of a neuron, where it is ready to fire an action potential.