Action Potential: A review

Front

When a neuron is resting, the inside of the axon has a ____________ charge.

Back

negative

Front

Most of the cell membrane is made of...

Back

Lipids

Front

The junction between 2 neurons is called the

Back

synapse

Front

A membrane potential becoming less negative is called

Back

depolarization

Front

Which ions are involved in an action potential?

Back

Na; K

Front

What is the resting membrane potential of a neuron?

Back

Approximately -70 mV.

Front

What is hyperpolarization?

Back

An increase in the membrane potential, making the inside of the cell more negative.

Front

What role do sodium ions (Na+) play in action potentials?

Back

They rush into the neuron during depolarization, causing the membrane potential to become more positive.

Front

What is repolarization?

Back

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

Front

What is the all-or-nothing principle in action potentials?

Back

Once a threshold is reached, an action potential will fire at full strength or not at all.