While Lifting Weights at the Gym, You Pause to Use

Multiple Choice

While lifting weights at the gym, you pause to use your fingertip to adjust the volume on your iPod.Which statement about the muscle contractions involved in adjusting the volume is true?

A) The fine control required to adjust the iPod demands more ATP than weightlifting does.
B) The smaller muscles of the fingertip have the same number of mitochondria per cell as the biceps used in weight lifting do.
C) The amount of tension generated in the fingertip contraction is likely to be as large as that in the biceps when weight lifting.
D) The same number of action potentials from a motor neuron is required to stimulate a twitch in a muscle fiber in the fingertip as is required to stimulate a twitch in a muscle fiber in the biceps.
E) A motor neuron innervates many more muscle fibers in the fingertip to accomplish fine control than are typically innervated by a motor neuron going to the biceps.