Elongated muscle fibers are more relaxed and can be trained to reach a zero firing threshold, a phenomenon that is verifiable with a(n)____ instrument.

Question

Quizplus · Accepted Answer

The instrument used to measure muscle activity and detect the zero firing threshold is an electromyograph (EMG). Therefore, the correct answer is C. An electrocardiograph (A) is used to measure the electrical activity of the heart, while magnetic resonance imaging (B) and electroencephalography (D) are imaging techniques that do not measure muscle activity.

Elongated Muscle Fibers Are More Relaxed and Can Be Trained