Question 1
Which statement about the Na
+/K
+ pump is FALSE?
◦ It is present in neurons.
◦ It transports Na
+ and K
+ in a 1:1 ratio.
◦ It transports Na
+ out of the cell and K
+ into the cell.
◦ Its activity requires energy input.
Question 2
Which statement about the resting membrane potential is TRUE?
◦ It results, in part, from the concentration gradients for Na
+ and K
+.
◦ It is due in part to the presence of extracellular proteins.
◦ It is normally equal to zero volts.
◦ The inside of the membrane is positively charged compared to the outside.