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Muscle Terminology Flashcards
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Muscle Terminology Flashcards

Created by
@ProlificRetinalite5738

Questions and Answers

What is an agonist?

  • A type of nervous tissue
  • A muscle that causes or controls joint motion (correct)
  • A muscle that stabilizes the body
  • A muscle that lengthens when the mover contracts

    • What is the all-or-none response in muscle fibers?

    The property where a muscle fiber contracts fully or not at all.

    What is an antagonist muscle?

  • A muscle that stabilizes a joint
  • A muscle located on the opposite side of a joint (correct)
  • A muscle that contracts to produce movement
  • A muscle that keeps muscles from moving

    • What is an aponeurosis?

    <p>A broad, flat sheet of fibrous connective tissue.</p> Signup and view all the answers

    Define concentric action.

    <p>A contraction where the muscle shortens with tone.</p> Signup and view all the answers

    Contractility refers to a muscle's ability to lengthen with adequate stimulation.

    <p>False</p> Signup and view all the answers

    What is deep fascia?

    <p>A coarse sheet that binds muscles into functional groups.</p> Signup and view all the answers

    What does dynamic force refer to?

    <p>Force applied that produces movement in an object.</p> Signup and view all the answers

    What is eccentric action?

    <p>A contraction in which the muscle lengthens with tone.</p> Signup and view all the answers

    Elasticity is the ability of a muscle to shorten and produce force.

    <p>False</p> Signup and view all the answers

    What is excitability in muscles?

    <p>The ability to receive and respond to a stimulus.</p> Signup and view all the answers

    Define extensibility.

    <p>The ability of a muscle to be stretched.</p> Signup and view all the answers

    What is fascia?

    <p>A fibrous membrane that supports and separates muscles.</p> Signup and view all the answers

    What is a fixator?

    <p>A stabilizing muscle at a joint that contracts to fix an area.</p> Signup and view all the answers

    What does insertion refer to in muscles?

    <p>The attachment of a muscle that moves when it contracts.</p> Signup and view all the answers

    Define isometric action.

    <p>A contraction where the muscle stays the same length with tone.</p> Signup and view all the answers

    What is isotonic action?

    <p>Action of muscle that occurs when tension develops while it shortens or lengthens.</p> Signup and view all the answers

    What is maximal stimulus?

    <p>The point at which all motor units of a muscle are recruited.</p> Signup and view all the answers

    Define motor unit.

    <p>A motor neuron and all the muscle fibers it controls.</p> Signup and view all the answers

    What is myoglobin?

    <p>A red pigment that stores oxygen in muscle cells.</p> Signup and view all the answers

    What does origin refer to in muscles?

    <p>The attachment of a muscle that does not usually move.</p> Signup and view all the answers

    Define oxygen debt.

    <p>The extra oxygen needed to remove lactic acid from anaerobic respiration.</p> Signup and view all the answers

    What is resting tone?

    <p>A state of tension in resting muscles.</p> Signup and view all the answers

    What does reverse action mean?

    <p>When the attachment that usually stays fixed moves.</p> Signup and view all the answers

    Define sliding filament mechanism.

    <p>The process describing skeletal muscle contraction.</p> Signup and view all the answers

    What is static force?

    <p>Force applied in such a way that it does not produce movement.</p> Signup and view all the answers

    Define synergist.

    <p>Movers of a joint other than the prime mover.</p> Signup and view all the answers

    What is threshold stimulus?

    <p>A stimulus at which the first observable muscle contraction occurs.</p> Signup and view all the answers

    What are trigger points?

    <p>Hyperirritable loci within a taut band of skeletal muscle.</p> Signup and view all the answers

    Study Notes

    Muscle Terms and Definitions

    • Agonist: Muscle responsible for joint motion; also referred to as the mover.
    • All-or-none response: Muscle fiber contracts fully or not at all when stimulated.
    • Antagonist: Muscle on opposite side of a joint that lengthens when the agonist contracts; performs opposite action.
    • Aponeurosis: Broad, flat fibrous connective tissue sheet.
    • Concentric Action: Muscle shortens and creates movement when contractile force exceeds opposing force.
    • Contractility: Distinct property of muscle tissue that enables it to shorten forcefully upon stimulation.
    • Deep Fascia: Dense connective tissue that organizes muscles into functional groups; creates intermuscular compartments.
    • Dynamic Force: Force causing movement in an object.
    • Eccentric Action: Muscle lengthens while contracting; opposing force exceeds contractile force and controls the mover's action.
    • Elasticity: Muscle's ability to return to its resting length after being stretched.
    • Excitability: Muscle's capability to receive and respond to stimuli.
    • Extensibility: Ability of muscle to stretch and lengthen.
    • Fascia: Connective tissue that supports and separates muscles; connects skin to muscle.
    • Fixator: Stabilizing muscle that contracts to hold a body part still, allowing another part to move.
    • Insertion: Moving attachment point of a muscle; typically distal; where muscle contracts.
    • Isometric Action: Muscle contracts without changing length; tension across muscle equals opposing force.
    • Isotonic Action: Muscle develops tension while shortening or lengthening.
    • Maximal Stimulus: Maximum force of contraction achieved when all motor units are recruited.
    • Motor Unit: A motor neuron and all muscle fibers it stimulates.
    • Myoglobin: Oxygen-storing red pigment found in muscle cells.
    • Origin: Fixed attachment point of a muscle; typically proximal and closest to the midline.
    • Oxygen Debt: Extra oxygen required to clear lactic acid from anaerobic glucose metabolism.
    • Resting Tone: Constant tension present in muscles at rest.
    • Reverse Action: When the origin moves during contraction and the insertion remains fixed.
    • Sliding Filament Mechanism: Process by which muscle fibers contract; thick and thin filaments slide over each other.
    • Static Force: Force applied without causing movement in an object.
    • Synergist: Assisting muscle that contributes to joint movement; can stabilize or support.
    • Threshold Stimulus: Minimum stimulus required for observable muscle contraction.
    • Trigger Points: Sensitive spots in muscle tissue that cause pain and can lead to referred pain; found in taut bands of muscle.

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    Description

    Test your knowledge on muscle terminology with this flashcard quiz. Learn key terms like agonist, antagonist, and all-or-none response. Perfect for students studying anatomy and physiology.

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