Cell membrane and cell excitation

Which ions are involved in an action potential?

• Na; Cl
• Na; K
• K; Cl
• Na; Ca

Which is the correct order of events in depolarisation then repolarisation? 

• Sodium channels close, potassium channels open
• Sodium channels open, potassium channels open, 
• Sodium channels open, potassium channels close
• Potassium channels open, sodium channels open

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

• A
• B
• C
• D

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

• Osmosis
• Diffusion
• Facilitated diffusion
• Active transport

Tags

NGSS.HS-LS1-3

A membrane potential becoming less negative is called

• hyperpolarization
• depolarization
• repolarization
• polarization