Question

Choose the correct answer from the alternatives given.
The speed at which impulses are conducted increases with

• A. Increasing number of dendrites
• B. Increasing branching of dendrites
• C. Increasing diameter of the soma
• D. Increasing diameter of the axon

Answer 1

Answer: (D)

Increasing diameter of the axon

The speed of a nerve impulse varies with the type of nerve impulse the nervous system is sending. Some signals such as those for muscle position, travel at speed up to 119 m/s. Nerve impulse such as pain signals travels slower at 0.61 m/s. Touch signals travel at speeds of 76.2 m/s.

So, the correct answer is 'increasing diameter of the axon'.