Action Potential

What is the normal resting potential of a neuron cell membrane?

• +40mV
• -30mV
• +55mV
• -70mV

Which ions are involved in an action potential?

• Na; Cl
• Na; K
• K; Cl
• Na; Ca

At which point on the diagram does depolarisation of the axon occur? 

• A
• B
• C
• D

Tags

NGSS.HS-PS2-5

The sodium potassium pump restores the resting potential. By which process does this work? 

• Osmosis
• Diffusion
• Facilitated diffusion
• Active transport

A membrane potential becoming less negative is called

• hyperpolarization
• depolarization
• repolarization
• polarization

In resting potential, neurons have more _________ on the outside of the cell membrane.

• K+
• NaCl
• Na+
• Cl-

An electrical impulse within a single neuron is called a

• synapse

• membrane potential

• action potential

• cell body

Which ion is pumped into the axon of a neuron to help maintain the resting potential?

• calcium

• hydrogen

• potassium

• sodium

Depolarization is occuring at number

• 1

• 2

• 4

• 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