You are studying the electrical properties of a bicep muscle and find that when the arm is in a neutral position there is some degree of alpha motor neuron activity,but no other activity.You conclude
A)the bicep has muscle tone but is otherwise relaxed.
B)the bicep muscle is completely relaxed.
C)the bicep muscle is half contracted and carrying a light weight.
D)the bicep muscle is complete contracted.

Question

Quizplus · Accepted Answer

Alpha motor neuron activity indicates that there is some degree of muscle tone present in the bicep, which means the muscle is partially contracted but still relaxed overall. If the muscle was completely relaxed, there would be no alpha motor neuron activity at all. Likewise, if the muscle was fully contracted, additional motor neuron activity would be present. Therefore, Choice A is the best answer.

You Are Studying the Electrical Properties of a Bicep Muscle