muscular system

Name the three types of muscle tissue and three key characteristics of each.
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Terms in this set (35)
The main function of muscle which is common to all muscle types.MovementThree additional functions that are specific to skeletal muscle.Maintain posture, stabilize joints, generating heatThe term given to the plasma membrane of a skeletal muscle cell.SarcolemmaThe name given to the specialized endoplasmic reticulum found within a muscle cell and what is stored and released there.Sarcoplasmic reticulumThe term given to the long, ribbon-like organelles found within the cytoplasm of a muscle cell. The names of the tiny contractile units that are aligned end-to-end along the length of the myofibril.SarcomeresExplain what produces the banding pattern within the sarcomeres.Myofilaments, there are two kinds one thicker one thinner to gove a banding patternIdentify the 2 types of myofilaments, and which one is thicker and which one is thinner.Myosin: thicker, actin: thinnerThe term given to the border at either end of the sarcomereZ lineList the four characteristics of muscle tissue that enable them to perform their duties and explain what they mean. (These were on the printed notes that we did for review)Excitability: the ability to respond to a stimulus (from a motor neuron or hormone) Contractibility: the ability to shorten when stimulated Extensibility: the ability to lenghten ot stretch, even past their oirginal shape Elasticity: the ability to recoil or bounce back to the original shape and length after being stretchedKnow what the prefixes endo-, peri-, and epi- mean.Endo-within Peri- surrounding Epi- overMuscles have two points of attachment to bone. Name them and explain where they attach.Origin: attakced to the immovable or less movable bone, insertion: attached to the movable boneFlexionA movement that decreases the angle of a joint bringing 2 bones closer togetherExtensionA movement that increases the angle or distance between 2 bones or parts of the bodyHyperextensionAn extension greater than 180 degreesRotationmovement of a bone around its longitudinal axisAbductionMoving a limb away from the midlineAdductionMoving a limb toward the midlineCircumductioncombination of flexion, extension, abduction, and adduction commonly seen in ball and socket joints, such as a shoulder, the proximal end is stationary and the distal end moves in a circleDorsiflexionupward movement of the foot at the ankle so that the superior surface approaches the shinPlantar flexionDown movement of the foot at the ankle, depressing the foot (pointing your toes)InversionsTurn the sole mediallyEversionTurn the sole laterallySupinationForearm rotates laterally so that the palm faces anteriorly and the radius and ulna are parallelPronationOccurs when the forearm rotates medially so that the palm faces posteriorlyOppositionUnique to the hand this is the action by which you move your thumb to touch the tips of the other fingers of the same hand