Role of atp in muscle contraction pdf
Nerves connect to muscles at neuromuscular junctions - a single nerve may connect with more than one muscle fiber The nerve and the muscle fibers it innervates is a “motor unit”. Nerve stimulation involves the release of a neurotransmitter from the axon terminus at the neuromuscular junction - “excitation- contraction coupling”. Muscle Contraction Fall, PEP Muscle Contraction & ATP Demand Rigor Complex: Myosin heads locked to actin filaments. Myosin head is in the strained position, but the muscle is relaxed. When ATP stores are depleted, (short time after death) . Full Answer. ADP, Pi and the myosin bridge then attach to actin, causing muscle contraction. During the muscle relaxation phase, actin displaces ADP and Pi at the myosin cross bridge. ADP and Pi are then reconstituted into ATP by the body, and the process starts again. Muscle contraction also requires the brain, the nervous system.