Neural Anatomy and Action Potential

Front

What part of a neuron receives information from other neurons?

Back

Dendrites

Front

What is the function of the Na+/K+ ATPase pump in maintaining resting membrane potential?

Back

The Na+/K+ ATPase pump moves 3 Na+ out for every 2 K+ in.

Front

What number(s) on a graph typically represent the Resting Potential?

Back

1 and 5

Front

Which ions are primarily involved in the electrical nerve impulse?

Back

Potassium and Sodium

Front

What number on a graph represents the Depolarization phase?

Back

2

Front

Define Resting Membrane Potential.

Back

The electrical potential difference across the membrane of a neuron when it is not actively sending a signal.

Front

What is Depolarization in the context of action potentials?

Back

A decrease in the membrane potential, making the inside of the neuron more positive.

Front

What role do ion channels play in action potentials?

Back

Ion channels allow specific ions to flow in and out of the neuron, changing the membrane potential.

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.

Front

What happens during the Repolarization phase of an action potential?

Back

The membrane potential returns to a more negative value after depolarization, primarily due to the efflux of K+ ions.