3251.3.3 Action Potential

a signal molecule that transmits nerve impulses across synapses

• neuron
• neurotransmitter
• nerve
• action potential

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

A membrane potential becoming less negative is called

• hyperpolarization
• depolarization
• repolarization
• polarization

Tags

NGSS.HS-PS2-5

When a membrane potential reaches +30mV, ________ channels open, ________ occurs, and ________ channels close.

• Sodium, depolarization, potassium
• Potassium, depoloarization, sodium
• sodium, repolarization, potassium
• postassium, repolarization, sodium

Tags

NGSS.HS-PS2-5

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

Excess neurotransmitters in the synapse that goes back into the presynaptic neuron.

• Resting potential
• Reuptake
• Retroactivity
• Repolarization

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