Increasing Axonal Diameter Increases the Length Constant for That Axon

Question

Increasing axonal diameter increases the length constant for that axon by
A) decreasing longitudinal resistance.
B) increasing longitudinal resistance.
C) decreasing membrane resistance.
D) increasing membrane resistance.
E) increasing capacitance.

Accepted Answer

Increasing axonal diameter decreases the longitudinal resistance, which in turn increases the length constant, allowing the electrical signal to travel further along the axon.