Bioelecticity

At rest, what ion is neuronal membrane more permeable to?

• Calcium

• Potassium

• All the same permeability

• Chloride

What equation takes into account an ion’s permeability?

• GHK

• Nerst

• Ionic equalibrium equation

• Pouseilles

The GHK equation gives a resting membrane potential of -69 mV instead of the measured value of -70mV. Why?

• Electrical and chemical gradients prefer uneven quantities

• It does not take into account the larger number of K+ leaky channels

• It does not take into account the passive diffusion of ions

• It does not take into account the 3Na/2K/ATPase pump

Other than Cl-, what is another major reason for the intracellular negative charge?

• F-

• GABA

• Negatively charged proteins

• O2-

What is not in the Nernst equation?

• Universal gas constant

• Temperature

• Valence of the ion

• Ion specific constant

Regarding the Na/K pump, choose the correct answer.

• It is activated by mechanically gated channels.

• Use 1 ATP to transport 3K+ in

• Breaks 1 phospho anhydride bond to transport 3Na+ out

• It’s a single pass integral protein