What happens to the rate of firing in motor neurons as we age?
A) No changes occur.
B) Firing rates decrease, leading to slower and weaker muscle responses.
C) Firing rates increase, leading to uncomfortable cramping.
D) Firing rates decrease, but muscle fibers are able to compensate for these changes.

Question

Quizplus · Accepted Answer

As we age, there is a decrease in the rate of firing in motor neurons, also known as motor unit discharge rate. This results in slower and weaker muscle responses since fewer muscle fibers are recruited to generate force.

What Happens to the Rate of Firing in Motor Neurons