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