Question

question
all of the following are true of nodal cells, except:
answer
nodal cells in the heart determine the heart rate.
nodal cells are electrically coupled to each other, to conducting fibers, and to typical cardiac muscle cells.
the cell membranes of nodal cells depolarize only in response to neural stimulation.
not all nodal cells depolarize at the same rate.

Explanation:

Nodal cells, like those in the sino - atrial node, are autorhythmic. They can depolarize spontaneously without neural stimulation. They determine the heart rate (as the pacemaker cells), are electrically coupled (allowing coordinated electrical activity), and different types of nodal cells (if considering different parts of the conduction system conceptually) may have slightly different depolarization rates (though the dominant pacemaker usually takes over).

Answer:

The cell membranes of nodal cells depolarize only in response to neural stimulation.