ANAT1053 Chapter Notes -Skeletal Muscle, Myocyte, Cell Membrane
Document Summary
Light (i) bands and dark (a) bands give the muscle its striped appearance. Contains the entire length of the thick filaments. M line is in center of h zone. Heads are known as cross bridges when they link thick and thin filaments during contraction. Stimulation and contraction of single skeletal muscle cells. Irritability (also called responsiveness) ability to receive and respond to a stimulus. Contractility ability to shorten when an adequate stimulus is received. Elasticity ability to recoil and resume resting length after stretching. Skeletal muscles must be stimulated by a motor neuron (nerve cell) to contract. Motor unit one motor neuron and all the skeletal muscle cells stimulated by that neuron. Association site of axon terminal of the motor neuron and sarcolemma of a muscle. Acetylcholine (ach) is the neurotransmitter that stimulates skeletal muscle. When a nerve impulse reaches the axon terminal of the motor neuron, ca++ channels open, and.
