Smooth Muscle Contraction and Function
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Questions and Answers

What type of protein filaments are found in sarcomeres of skeletal muscles?

  • Keratin and collagen
  • Elastin and fibrin
  • Hemoglobin and albumin
  • Myosin and actin (correct)
  • Which type of muscle tissue has spindle-shaped cells and is involuntary in function?

  • Skeletal muscles
  • Cardiac muscles
  • Smooth muscles (correct)
  • Nervous tissues
  • What is the function of cardiac muscles in the body?

  • Support
  • Pumping (correct)
  • Heat generation
  • Posture maintenance
  • In which type of muscles is the nucleus located near the center of the cell?

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

    What provides support and organization to muscle fibers in skeletal muscles?

    <p>Connective tissue coverings</p> Signup and view all the answers

    Which type of muscle generates heat to maintain body temperature?

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

    Which of the following is NOT a function of skeletal muscles?

    <p>Producing hormones</p> Signup and view all the answers

    What is the primary role of skeletal muscles when maintaining posture and body position?

    <p>Making fine adjustments</p> Signup and view all the answers

    Which type of muscle has smooth muscle cells that lack striations and have a single, centrally located nucleus?

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

    What is a significant by-product of muscle metabolism?

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

    Where are smooth muscles found in the human body?

    <p>In the walls of hollow organs and structures like blood vessels</p> Signup and view all the answers

    What role do skeletal muscles play in providing nutrient reserves?

    <p>Breaking down proteins during fasting</p> Signup and view all the answers

    What type of muscle movement does smooth muscle produce in the digestive tract?

    <p>Slow, sustained contractions</p> Signup and view all the answers

    Which part of the body does smooth muscle contribute to in maintaining posture?

    <p>Blood vessels</p> Signup and view all the answers

    What role does smooth muscle play in supporting the structure of internal organs?

    <p>Regulating the size of internal spaces</p> Signup and view all the answers

    How does smooth muscle contribute to maintaining body temperature?

    <p>Generating heat through sustained muscle contractions</p> Signup and view all the answers

    How are smooth muscle cells structured to enable coordinated movement?

    <p>Sheets or layers</p> Signup and view all the answers

    Which mechanism initiates smooth muscle contraction?

    <p>Calcium ions binding to calmodulin</p> Signup and view all the answers

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