The energy for muscle contraction is most directly obtained from

it is obtained from Adenosine triphosphate(ATP).

Explanation:

In muscle metabolism, muscle need energy for contraction. This energy is obtained from the Adenosine triphosphate (ATP) present in the muscle. The muscle contain limited quantities of ATP. When it is depleted, ATP need to be resynthesize from other available sources like creation phosphate and muscle glycogen.

Metabolism is the total activities which take place in the body to create energy and other substances for its activities.

hello there,

igneous rock formed from below the surface would have more crystals because

answer: because magma cools more slowly than lava

just go with your heart buddy