Increasing axon diameter decreases membrane and intracellular resistance, so it seems the two might cancel each other out in terms of their effect on the conduction speed. Yet, conduction speed is increased by increasing diameter size. Why?

A) Membrane resistance doesn't really affect conduction speed that much.
B) Intracellular resistance doesn't really affect conduction speed that much.
C) Membrane resistance decreases linearly while intracellular resistance decreases by the square of the radius.
D) Intracellular resistance decreases linearly while membrane resistance decreases by the square of the radius.


Answer: C

Anatomy & Physiology

You might also like to view...

The anatomic position allows all observers to have a common point of reference.

Answer the following statement true (T) or false (F)

Anatomy & Physiology

The central, pale area of a red blood cell that represents the thinnest part of the biconcave disc is the area of _________________________________________

Fill in the blank(s) with correct word

Anatomy & Physiology

Which structure is the site of implantation?

A) Ovary B) Uterine tube C) Vagina D) Uterus

Anatomy & Physiology

Interlobar veins unite at the right and left ____veins that exit the right and left kidney at the hilum

a. arcuate b. hepatic c. renal d. abdominal

Anatomy & Physiology