Bob tried to open a jar of pickles, but the lid did not budge. The muscles of his hands and arms were
A) in isometric contraction.
B) in dynamic contraction.
C) locked in a stretch reflex.
D) in motor pools.
E) in extension.

Question

Quizplus · Accepted Answer

Isometric contraction is a type of muscle contraction where the muscle produces tension, but there is no movement of the joint. In this scenario, Bob's muscles are producing tension, but there is no movement of the jar lid.

Bob Tried to Open a Jar of Pickles, but the Lid