Nerve Physiology #2: Action Potential

Front

What is the Resting Membrane Potential of a neuron?

Back

-70 mV

Front

What phase of the action potential is represented by the number 2 on a graph?

Back

Depolarization phase

Front

What is the correct pathway for nerve impulse transmission?

Back

dendrite > cell body > axon > synapse > dendrite

Front

What charge does the inside of a resting axon have?

Back

-70 mV

Front

Which ion channels open during the depolarization of a neuron?

Back

Sodium channels

Front

Define Action Potential.

Back

A rapid rise and fall in voltage or membrane potential across a cellular membrane.

Front

What is the threshold potential for a neuron to fire an action potential?

Back

Approximately -55 mV.

Front

What happens during the repolarization phase of an action potential?

Back

Potassium channels open, allowing K+ ions to exit the neuron.

Front

What is the role of sodium ions in action potential generation?

Back

Sodium ions enter the neuron, causing depolarization.

Front

What is the significance of the synapse in nerve transmission?

Back

It is the junction where neurotransmitters are released to transmit signals between neurons.