muscle physiology

Muscle physiology refers to how muscles function in the body. Muscles are made up of fibers that contract, or shorten, to produce movement. When your brain sends a signal, these fibers activate, using energy from ATP (adenosine triphosphate). There are three types of muscle: skeletal (voluntary movement), cardiac (heart muscle), and smooth (involuntary actions like digestion). Muscles also adapt to exercise, becoming stronger and more efficient. The process involves intricate chemical reactions and interactions between proteins like actin and myosin, enabling a wide range of motions and essential bodily functions.