What Happens to the Rate of Firing in Motor Neurons

question 127

Multiple Choice

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 contractions.
• C) Firing rates increase,leading to uncomfortable cramping.
• D) Firing rates decrease,but muscle fibers are able to compensate for these changes.

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Definitions:

ADHD

Attention Deficit Hyperactivity Disorder, a neurodevelopmental disorder characterized by difficulties with attention, impulse control, and hyperactivity.

Metabolism

The biochemical processes that occur within a living organism to maintain life, involving the conversion of food into energy and building materials.

Dopamine

A neurotransmitter associated with movement, attention, learning, and the brain’s pleasure and reward system.

Serotonin

A neurotransmitter critical in many physiological processes, including mood regulation, digestion, and sleep.