Relier Pairs The Muscle SystemVersion en ligne Students use this game to review material learned from the Muscle System in Anatomy & Physiology. par Sherri Grosso 1 The neurotransmitter responsible for muscle contraction, since it will be released into the synapse. 2 This is released from the sarcoplasmic reticulum in response to the change in voltage across the membrane during a nerve transmission through muscle. It binds to troponin so that cross-bridges form between actin and myosin 3 Skeletal Muscle 4 Smooth Muscle 5 6 This is the neuromuscular junction where a nerve impulse reaches a sarcolema. 7 Myosin- These molecules have a club-shaped head that will extend toward and bind to another binding site to pull the muscle together. 8 The electrical current generated by the reversal of charge across the muscle cell membrane, which causes the muscle to contract. 9 Z-line 10 11 12 13 A-band 14 Cardiac Muscle 15 - Attached to bones - Voluntary, you control these muscles - Striated - Single, long, cylindrical multi-nucleate cells - Strong, rapid contraction - Not rhythmic Mostly in walls of hollow, visceral organs NO striations Spindle-shaped cells in sheets or layers Slow, sustained contractions move substances through the organ or along a tract Action Potential This depicts the unit called the sarcomere which is responsible for an individual muscle cell contraction. A dark thin protein band to which actin filaments are attached in a striated muscle fiber, marking the boundaries between adjacent sarcomeres Tendon- a fibrous connective tissue that connects a muscle to a bone. Calcium Actin- contains binding sites that are covered by regulatory proteins until calcium ions are present to allow a binding molecule to attach itself to it and pull the two molecules past each other. The interaction between actin and myosin filaments in this area of the sarcomere is responsible for the muscle contraction. Acetylcholine - Found only in the heart - Involuntary - Has striations - They are branching chains of cells - Steady, rhythmic contractions
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