Action Potentials

Part of a neuron that receives information from other neurons

• axon
• dendrites
• myelin sheath
• 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

Tags

NGSS.HS-PS2-5

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

• -55 mV
• -70 mV
• 40 mV
• -75 mV

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

Tags

NGSS.HS-PS2-5

NGSS.HS-PS1-2

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

Why is -55 mV a significant number?

• This is the largest charge achieved during an action potential
• This is the threshold required to complete an action potential
• This is the resting charge of a neuron
• This is the charge when all the sodium is inside the cell

During this stage, K+ channels open and K+ Ions leave the neuron.

• Depolarizarion
• Repolarization
• Hyperpolarization
• Resting Potential