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A & P

Muscular System

QuestionAnswer
Excitability receiving and responding to stimuli
Contractility force generated to shorten and thicken
Extensibility ability of muscles to be streched
Elasticity Ability of muscle to return to original state
Sarkos Flesh
Mys Muscle
Fascia surrounds and separates each muscle; underlies skin penetrating and separating mucles
Aponeurosis Broad fibrous tissue; attaches muscle to bone or muscle to muscle;
Sarcolemma cell membrane
T Tubules Invaginations that extend from sarcolemma through the muscle fiber
Sarcoplasmic Reticulum Smooth ER; Stores Ca+ ions
Myofilaments Thin-Actin-light; Thick-Myosin-dark the striations of the cell
Sarcomere structural and functional unit of a muscle; separated by Z-lines
Z-Lines Segment of myofibrils between
Proteins of the muscle Actin, myosin
Difference between tendon and Aponeurosis Aponeurosis is broad....obliques and abdominals
Muscle fibers cylindrical ells composing of fibers
Z-line to Z-line Sarcomere
Myosin-binding site structure of actin molecules that interacts w/ crossbridge of myosin
Tropomyosin-Troponin Proteins of actin molecule which are involved in muscle contractions
Cross bridge where they touch together the actin and myosin
Motor Unit one motor neuron and all muscle fibers that it is attached to
Motor End Plate high concentration of muscle fibers mitochondria and nuclei
Sliding filament theory myocin and actin completing the connection for contraction
Threshold stimulus All or none...either muscle contracts or doesn't
Tetanus sustained contractions as a result of continuous stimuli
Treppe tension increases after each contraction
Tetany kinds of complete and incomplete, Treppe
Isotonic Shortening of muscle with the movement of the body part
Hypertrophy Muscles get bigger
Isometric Minimum shortening of muscle with out moving
Created by: cborealis2