Biology 2nd Edition by Robert Brooker, Eric Widmaier ,Linda Graham ,Peter Stiling

تمرين 6

The tendency for Na + to move into the cell can be due to
A) the higher numbers of Na + outside the cell, resulting in a chemical concentration gradient.
B) the net negative charge inside the cell attracting the positively charged Na +.
C) the attractive force of K + inside the cell pulling Na + into the cell.
D) all of the above.
E) a and b only.