IB Bio 6.5 Neurons and Synapses

Front

What is a nerve impulse?

Back

An electrical current that travels along dendrites or axons.

Front

What represents the Resting Potential on a graph?

Back

Numbers 1 and 5.

Front

When a cell is at rest, how are the charges distributed?

Back

The inside is more negative and the outside is more positive.

Front

What does the sodium-potassium pump do?

Back

Moves sodium ions out of the cell and potassium ions into the cell.

Front

What does the letter 'A' represent in a neuron diagram?

Back

Dendrite.

Front

Define 'Resting Potential'.

Back

The electrical potential difference across the membrane of a neuron when it is not transmitting an impulse.

Front

What is the role of dendrites in a neuron?

Back

To receive signals from other neurons.

Front

What is an axon?

Back

A long, slender projection of a neuron that conducts electrical impulses away from the cell body.

Front

What is the function of the axon terminal?

Back

To release neurotransmitters into the synapse.

Front

What is a synapse?

Back

The junction between two neurons where communication occurs.