Nerve Impulse

Front

What is the Resting Potential of a neuron?

Back

The Resting Potential is the electrical charge difference across the neuron's membrane when it is not actively transmitting a signal, typically around -70mV.

Front

What charge does the inside of a resting neuron have?

Back

The inside of a resting neuron has a negative charge.

Front

What must a neuron release before an action potential can move to the next neuron?

Back

A neuron must release neurotransmitters into the synapse.

Front

What are the first channels to open when a neuron is depolarized?

Back

Sodium channels are the first to open during depolarization.

Front

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

Back

The number 2 represents the Depolarization phase.

Front

What is an action potential?

Back

An action potential is a rapid rise and fall in voltage or membrane potential across a cellular membrane, allowing neurons to transmit signals.

Front

What role do neurotransmitters play in nerve impulses?

Back

Neurotransmitters are chemical messengers that transmit signals across the synapse from one neuron to another.

Front

What happens during the repolarization phase of an action potential?

Back

During repolarization, potassium channels open, allowing potassium ions to flow out of the neuron, restoring the negative internal charge.

Front

What is the significance of the sodium-potassium pump in neurons?

Back

The sodium-potassium pump helps maintain the resting potential by actively transporting sodium out of the cell and potassium into the cell.

Front

What is hyperpolarization in the context of nerve impulses?

Back

Hyperpolarization is when the membrane potential becomes more negative than the resting potential, making it less likely for an action potential to occur.