Muscular System Functions Quiz
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Muscular System Functions Quiz

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Questions and Answers

Which type of muscle is classified as voluntary?

  • Cardiac muscle
  • Skeletal muscle (correct)
  • Both smooth and cardiac muscle
  • Smooth muscle

    • What is the basic structural and functional unit of a skeletal muscle?

  • Myofibril
  • Sarcomere (correct)
  • Cell
  • Sarcoplasm

    • Which of the following is NOT a function of the muscular system?

  • Communication
  • Movement
  • Respiration
  • Absorption (correct)

    • What does the term extensibility refer to in muscles?

    <p>Ability to be stretched and still contract</p> Signup and view all the answers

    Which structure of the muscle fiber is crucial for regulating intracellular calcium levels?

    <p>Sarcoplasmic Reticulum</p> Signup and view all the answers

    Which function is primarily responsible for maintaining posture?

    <p>Movement of the body</p> Signup and view all the answers

    Which of the following is involved in the contraction of the heart?

    <p>Cardiac muscle</p> Signup and view all the answers

    How does the muscular system contribute to respiration?

    <p>By enabling movement of the ribcage</p> Signup and view all the answers

    Which of these muscles is classified as voluntary?

    <p>Skeletal muscle</p> Signup and view all the answers

    What is the basic structural and functional unit of a skeletal muscle?

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

    Which function is NOT associated with the muscular system?

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

    Which definition accurately describes extensibility?

    <p>Ability of a muscle to be stretched beyond its normal resting length and still contract</p> Signup and view all the answers

    Which structure within the muscle fiber is crucial for regulating intracellular calcium levels?

    <p>Sarcoplasmic Reticulum</p> Signup and view all the answers

    Which type of muscle tissue can contract without involuntary control?

    <p>Smooth muscle</p> Signup and view all the answers

    What component is primarily responsible for muscle contraction?

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

    Which protein is primarily involved in muscle contraction by sliding over myosin?

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

    Which function of the muscular system is primarily responsible for keeping us upright?

    <p>Maintenance of posture</p> Signup and view all the answers

    What is the role of skeletal muscle during respiration?

    <p>To contract the thorax and diaphragm</p> Signup and view all the answers

    What by-product is produced by the contraction of skeletal muscles?

    <p>Body heat</p> Signup and view all the answers

    How do muscles contribute to communication?

    <p>By enabling vocal cord function</p> Signup and view all the answers

    What is the function of smooth muscle contraction?

    <p>To cause constriction of internal organs and vessels</p> Signup and view all the answers

    Which property of muscle tissue refers to its ability to shorten forcefully?

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

    Which of the following is NOT a function of the muscular system?

    <p>Hormonal regulation</p> Signup and view all the answers

    What effect does cardiac muscle contraction have on the heart?

    <p>It causes the heart to beat</p> Signup and view all the answers

    What is the characteristic of muscle tissue that allows it to be stretched beyond its normal resting length and still contract?

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

    Which protein forms the thick myofilament in muscle fibers?

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

    Which layer surrounds each fascicle within a skeletal muscle?

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

    What structure in a muscle cell is responsible for storing calcium ions?

    <p>Sarcoplasmic reticulum</p> Signup and view all the answers

    What is the functional property of muscle tissue that allows it to return to its original length after being stretched?

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

    In a sarcomere, where are the actin filaments located?

    <p>Attached to the Z line and extending toward the center</p> Signup and view all the answers

    What is the name of the fibrous covering that surrounds a whole muscle?

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

    What component is considered a calcium regulatory molecule in muscle contraction?

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

    Which of the following is NOT a functional property of muscle tissue?

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

    What best describes the arrangement of myofilaments within each myofibril?

    <p>In sarcomeres</p> Signup and view all the answers

    Study Notes

    Muscular System Functions

    • The muscular system is responsible for body movement, maintaining posture, respiration, producing body heat, communication, constriction of organs and vessels, and contraction of the heart.
    • Skeletal muscles attached to bones are responsible for the majority of body movements.
    • Skeletal muscles maintain tone, which keeps us sitting and standing erect.
    • Contraction of the skeletal muscle of the thorax and diaphragm facilitates respiration.
    • Contraction of skeletal muscle produces heat as a byproduct.
    • The muscular system is involved in all aspects of communication.
    • Contraction of smooth muscle within the walls of internal organs and vessels causes constriction of these structures.
    • Contraction of cardiac muscle causes the heart to beat.

    Functional Properties of Muscle Tissue

    • Contractility: The ability of muscle to shorten forcefully.
    • Muscle shortening is forceful, while muscle lengthening is passive.
    • Excitability: A muscle can be stimulated by a nerve to contract.
    • Extensibility: A muscle can be stretched beyond its normal resting length and still be able to contract.
    • Elasticity: The ability of the muscle to return to its original resting length after it has been stretched.

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    Related Documents

    Unit 5.1 The Muscular System PDF

    Description

    Test your knowledge on the functions and properties of the muscular system. This quiz covers the roles of different muscle types, including skeletal, smooth, and cardiac muscles. Assess your understanding of how these muscles contribute to movement, respiration, and overall body functions.

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