Neural Messaging

When a neuron is at rest, it is said to be ______?

• polarized

• depolarized

• repolarized

• resting

When a neuron is stimulated, it becomes locally _______?

• polarized

• depolarized

• repolarized

When a neuron is stimulated, the first event is the opening of the potassium channels?

• true

• false

When a neuron is depolarized, it triggers what is called an action potential?

• true

• false

Potassium channels open and allow restoration of electrical charges, repolarizing a neuron. But what is it that restores ion concentrations?

• sodium channels

• sodium pumps

• sodium-potassium pumps

• ATP synthase

The sodium-potassium pump pumps K+ out of the cell

• true

• false

To send a message from the axon terminal of one neuron to the dendrite of the next, a neuron uses?

• calcium ions

• sodium ions

• potassium ions

• neurotransmitters