HAP #33 - Action Potentials

Part of a neuron that receives information from other neurons

• axon
• dendrites
• myelin sheath
• synapse

a junction at which a neuron meets another cell

• 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

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

What number on the graph represents the Depolarization phase?

• 1
• 2
• 3
• 4

What number on the graph represents the Hyperpolarization phase?

• 1
• 2
• 3
• 4

At what stage does Potassium end outside the neuron, and Sodium ends inside the neuron?

• Depolarizarion
• Repolarization
• Hyperpolarization
• Resting Potential