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Equilibrium potential (K+, animal cell)

Q.

The figure shows an animal cell with the following labeled:
● Potassium (K+) ion concentrations (measured in mM) inside and outside the animal cell
● Membrane potential (-70 mV)
● K+ channel

a) In this situation, there is net movement of K+ ions out of the animal cell through the K+ channel (as indicated by the arrow). What would have to change to cause net movement of K+ INTO the animal cell? Identify as many ways as you can.

b) Explain how the ways you identified above cause K+ to move INTO the animal cell.ANEION

Audiences:

Undergraduate

Topics:

Flux,  Physiology,  Biology,  Ion movement,  Neurophysiology

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