AP Psych Module 9 Practice: Neurons and Nerve Impulses

Front

What are the electrical signals that carry information from our environment to the brain called?

Back

Action potentials

Front

What is the voltage difference maintained by a neuron when at rest called?

Back

Resting potential

Front

What are the pores formed using proteins that selectively allow certain ions to pass through in a neuron called?

Back

Ion channels

Front

When does a neuron generate a nerve impulse?

Back

When the total sum of input signals is large enough to cross a threshold potential

Front

What is the process of restoring the more negative voltage difference in a neuron called?

Back

Repolarization

Front

What is the voltage of a neuron at rest?

Back

-70mV

Front

What is the purpose of the myelin sheath in a neuron?

Back

To speed up signalling

Front

What happens when a neuron fires?

Back

The voltage becomes more positive

Front

What is the purpose of ion channels in a neuron?

Back

To selectively allow certain ions to pass through

Front

What is it called when the inside of the neuron is negatively charged relative to the outside of the membrane? Options: polarization, depolarization

Back

polarization