The Nervous System Unit

part of a neuron that receives information from other neurons

• axon
• dendrites
• myelin sheath
• synapse

a signal molecule that transmits nerve impulses across synapses

• neuron
• neurotransmitter
• nerve
• action potential

Which ions are involved in the electrical nerve impulse?

• Iodine and Sodium
• Potassium and Sodium
• Iron and Sodium
• Calcium and Iodine

What contains the nucleus of the neuron?

• Terminal Bouton

• Cell Body

• Axon Hillock

• Myelin Sheath

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

• Sodium
• Potassium
• Calcium
• ACTH

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

• 1 and 2
• 1 and 5
• 2 and 3
• 3 and 4

Tags

NGSS.HS-LS1-3

-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

Tags

NGSS.HS-PS2-5

What number on the graph represents the Depolarization phase?

• 1
• 2
• 3
• 4

Tags

NGSS.HS-PS3-5

What number on the graph represents the Hyperpolarization phase?

• 1
• 2
• 3
• 4