1) It enables you to manipulate your environment. 2). It influences the body’s contours and shape. 3). It is one of the major components of hollow organs. 4). It provides a means of locomotion.
production of body heat.
hemoglobin concentration in muscle fibers increases.
myosin heads bind to actin.
calcium concentration in the sarcomere increase.
the I bands shorten and H zones disappear.
ATP is hydrolyzed
Triggers sliding of myofilaments and ATPase activity
The action potential triggers Ca2+ release from the sarcoplasmic reticulum
Promotes glycogen breakdown and ATP synthesis
Promotes neurotransmitter release
Triggers diffusion of Na+ out of the cells
Skeletal muscle contractions help maintain body temperature.
Skeletal muscles are responsible for the pumping action of the heart.
Skeletal muscles support the weight of some internal organs.
Skeletal muscles are responsible for guarding the openings of the digestive and urinary tracts.
The contractions of skeletal muscles pull on tendons and move elements of the skeleton.