Electrophysiology

What is the numerical value for resting membrane potential (RMP) in a neuron or skeletal muscle cell?

• 150mV

• -70mV

• -90mV

• 15mV

The inside of the cell has a ______ charge compared to the outside

• Positive

• Negative

What direction does K+ leak through the leaky channels?

• In

• Out

Can large protein anions leave the cell?

• Yes

• No

If K+ was the only ion that mattered for RMP, RMP would have which numerical value?

• -70mV

• 150mV

• 15mV

• -90mV

Tags

NGSS.HS-LS1-3

What direction does Na+ leak through the leaky channels?

• In

• Out

Which of the two ions has the MOST leaky channels in the membrane?

• Na+

• K+

Which important pump in the cell membrane keeps the RMP at the right level at rest?

• ATPase Pump

• Topoisomerase Pump

• Sodium ATPase Pump

• Sodium Potassium ATPase Pump

____ Na+ are pumped _____ each time the pump turns.

• 3, In

• 2, In

• 3, Out

• 2, Out

____ K+ are pumped _____ each time the pump turns.

• 3, In

• 2, Out

• 3, Out

• 2, In

Tags

NGSS.HS-LS1-3