You are recording from several neurons. You tested out
where the threshold potential is of all cells. Just above
threshold, the shape of the action potentials of the cells you
record from look different and kind of like this:
What could explain the differences in amplitude, and the
slope of the rising and falling phase of these action
potentials?
SELECT ALL THAT APPLY
A. In cell A more voltage gated sodium channels are
available than in cell B.
B. In cell B more potassium channels are available than
in cell A
C. In cell A the threshold potential is more negative,
while the Na equilibrium potential is the same, leading to a
greater driving force for sodium to enter the cell once channels
open up than in cell B.
D. In cell A the equilibrium potential for sodium is
higher (more positive) than in cell C.
E. In cell C more potassium channels are available than
in cell A