Isometric contraction occurs at the of a muscle contraction, as well as during prolonged activities.

It occurs at the tension of the muscles. That is, the joint is static; there is no expansion of the muscle fibers and the limbs will not move. There is no change in the length of the muscle fibers themselves, and there is also no movement at the joints, but the muscle fibers still fire.

the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.