Nervous System

part of a neuron that receives information from other neurons

• axon

• dendrites

• myelin sheath

• synapse

nerve impulse

• action potential

• resting potential

• membrane potential

• synapse

What number(s) on the graph represents the Resting Potential?

• 1 and 2

• 1 and 5

• 2 and 3

• 3 and 4

When a neuron is depolarized, what are the first channels to open?

• Sodium

• Potassium

• Calcium

• ACTH

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

• positive

• negative

When a neuron is not engaged in an impulse.

• Resting potential

• Action potential

• Neural potential

• Synaptic potential

Which ions are involved in the electrical nerve impulse?

• Iodine and Sodium

• Potassium and Sodium

• Iron and Sodium

• Calcium and Iodine

What is the difference between white and grey matter?

• White matter is myelinated axons, gray matter is unmyelinated axons.

• White matter is unmyelinated axons, and grey matter is myelinated axons.

• White matter is sensory axons, and grey matter is motor axons.

• White matter is motor axons, and grey matter is sensory axons.

-70 mV is the measure of a

• Threshold Potential

• Action Potential

• Resting Potential

• End Point Potential

A membrane potential becoming less negative is called

• hyperpolarization

• depolarization

• repolarization

• polarization