Resting Membrane Potential

What is the typical resting potential for a neuron?

• +50 millivolts

• -60 millivolts

• -50 millivolts

• -70 millivolts

What voltage is inside the neuron when it is in its "resting membrane potential"?

• -55 mV

• +30 mV

• -70 mV

• 0 mV

What are the 2 main ions involved in maintaining the resting membrane potential? (Select 2)

• K+

• Na+

• F-

• Li+

At its resting membrane potential, inside the neuron has a high concentration of ​ (a)   ions and outside the neuron a high concentration of ​ (b)   ​ ions.

• K+

• Na+

• Li+

• F-

Which of the following is true regarding the sodium/potassium pump?

• They pump out 3 Na+ and pump in 2 K+

• They pump out 3 K+ and pump in 2 Na+

• They pump out 2 Na+ and pump in 3 K+

• They pump out 2 K+ and pump in 3 Na+

Tags

NGSS.HS-LS1-3

Which molecules CAN easily pass directly through the phospholipid bilayer of the neuron? (Select 2)

• Polar molecules

• Proteins

• Oxygen

• CO2

• Charged ions

What is the resting membrane potential of neurons maintained by?

• Chemically gated Na+ Channels 

• Chemically gated K+ channels 

• Na+/K+ ATPase pump 

• Na+/H+ ATPase pump 

Tags

NGSS.HS-LS1-3

What is the primary ion responsible for the negative charge inside a neuron at resting membrane potential?

• Na+

• K+

• Cl-

• Ca2+

Which of the following best describes the resting membrane potential?

• The inside of the neuron is positively charged compared to the outside

• The inside of the neuron is negatively charged compared to the outside

• The inside and outside of the neuron have equal charge

• The outside of the neuron is negatively charged compared to the inside

What is the role of the sodium-potassium pump in maintaining the resting membrane potential?

• It allows passive diffusion of ions

• It actively transports Na+ out and K+ into the cell

• It transports K+ out and Na+ into the cell

• It maintains equal concentrations of Na+ and K+ inside and outside the cell

Tags

NGSS.HS-LS1-3