muscle biology

Muscle biology involves specialized tissues that convert electrical signals into movement. Muscles are made up of fibers containing the protein filaments actin and myosin, which slide past each other to produce contraction. This process requires energy from ATP. When the brain sends a signal, it triggers calcium release inside muscle cells, allowing actin and myosin to interact. As these filaments slide, the muscle shortens and generates force. Different types of muscles (skeletal, cardiac, smooth) support various functions like movement, heartbeats, and internal organ activity. Overall, muscles enable us to move, maintain posture, and support vital bodily functions.