All of the Following Are True Regarding Motor Units Except

question 59

Multiple Choice

All of the following are true regarding motor units except

• A) Muscles in the fingers have a small number of muscle fibers per motor unit.
• B) If needed, additional motor units can be recruited to accomplish a movement.
• C) A muscle can produce more force if more motor units are recruited.
• D) A single motor unit only innervates muscle fibers in a small area of a muscle.

---

Definitions:

Unconditioned Response

An automatic, natural reaction to a stimulus that occurs without prior learning or conditioning.

Fireworks

Pyrotechnic devices that produce visual and auditory effects for entertainment purposes.

Fear Reaction

An emotional response to perceived threats or danger, often characterized by feelings of anxiety, increased heart rate, and a variety of physiological changes preparing the body for fight or flight.

Acquisition

The learning phase during which a response is established, or the gaining of knowledge, skills, or objects through various means.