Why is it easier to lift an ink pen than it is to lift a 25-lb barbell?

A) It requires fewer motor units to lift the ink pen.
B) It takes more time for muscle tension to exceed the load of a light object than a heavy object.
C) The time for muscle tension to exceed load is not dependent on the mass of an object.
D) It takes less time for muscle tension to exceed the load of a heavy object than a light object.


A

Anatomy & Physiology

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