Question

Which cells are responsible for contraction and relaxation movement

Answer 1

Answer:

Each skeletal muscle fiber is a skeletal muscle cell. These cells are incredibly large, with diameters of up to 100 µm and lengths of up to 30 cm. The plasma membrane of a skeletal muscle fiber is called the sarcolemma. The sarcolemma is the site of action potential conduction, which triggers muscle contraction.

Answer 2

Answer:

ATP - Adenosine Triphosphate