The nurse is helping the patient to perform leg exercises after surgery to prevent thrombophlebitis.Which type of muscle is the patient using for these exercises?

A) Skeletal
B) Smooth
C) Cardiac
D) Slow-twitch fibers

Skeletal muscle moves the bones with ligaments.Smooth muscle is found in the digestive tract and other hollow structures,such as the blood vessels and bladder.Cardiac muscle contracts spontaneously and as blood is ejected out of the heart.Slow-twitch fibers are a subtype of skeletal muscle cell.Slow-twitch fibers (type I),or "red" muscle,have a rich blood supply and are rich in mitochondria (the powerhouse of the cell)to give the muscle more oxygen and energy to sustain aerobic activity.The fast-twitch fibers (type II skeletal muscle type)are known as "white" muscle.These fibers increase the speed of muscle contraction.