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Chapter 6 Vocab Part A
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To move away from the midline of the body.
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Abduct
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Chemical transmitter substance released by some nerve endings.
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Acetylcholine
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A contractile protein of muscle.
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Actin
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A large transient depolarization event, including polarity reversal, that is conducted along the membrane of a muscle cell or a nerve fiber.
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Action Potential
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To move toward the midline of the body.
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Adduct
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Oxygen-requiring.
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Aerobic
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Respiration in which oxygen is consumed and glucose is broken down entirely; water, carbon dioxide, and large amounts of ATP are the final products.
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Aerobic Respiration
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Not requiring oxygen.
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Anaerobic
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Muscle that reverses, or opposes, the action of another muscle.
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Antagonist
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Fibrous or membranous sheet connecting a muscle and the part it moves.
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Aponeurosis
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Specialized muscle of the heart.
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Cardiac Muscle
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Thin connective tissue surrounding each muscle cell.
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Endomysium
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Sheath of fibrous connective tissue surrounding a muscle.
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Epimysium
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Movement that increases the angle of a joint, e.g., straightening a flexed knee.
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Extension
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Bundle of nerve or muscle fibers bound together by connective tissues.
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Fascicle
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Muscle that immobilizes one or more bones, allowing other muscles to act from a stable base.
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Fixator
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Soft; flabby; relaxed.
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Flaccid
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Movement that decreases the angle of the joint, e.g., bending the knee from a straight to an angled position.
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Flexion
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A response that varies directly with the strength of the stimulus.
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Graded Response
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Movable attachment of a muscle.
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Insertion
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Of the same length.
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Isometric
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Having a uniform tension; of the same tone.
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Isotonic
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Product of anaerobic metabolism, especially in muscle.
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Lactic Acid
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A motor neuron and all the muscle cells it stimulates.
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Motor Unit
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A muscle cell.
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Muscle Fiber
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