physioex : quiz 7 activity 3

For those who need it.

What effect did increasing the extracellular potassium have on the resting membrane potential?
a  The resting membrane potential became less negative.  
b  The resting membrane potential disappeared.  
c  The resting membrane potential became more negative.  
d  The resting membrane potential did not change.  

A

What effect did decreasing the extracellular sodium have on the resting membrane potential?
a  Only a small change occurred, because the sodium channels were mostly open.  
b  The resting membrane potential disappeared.  
c  The resting membrane potential became less negative.  
d  Only a small change occurred, because the resting neuron is not very permeable to sodium.  

D

 The channels that provide for the movement of potassium in the resting neuron are _______.
a  leakage  
b  leakage and chemically gated.  
c  voltage gated  
d  chemically gated  

A

 Establishing the resting membrane potential requires energy through the use of the _______.
a  sodium-glucose pump  
b sodium leakage channels  
c potassium-glucose pump  
d  sodium-potassium pump  

D