Cell Membrane Structure and Function
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Questions and Answers

What is the main function of the cell membrane?

  • Maintaining homeostasis
  • Assisting in cell movement
  • Creating stable internal conditions (correct)
  • Regulating cell division

    • Which term describes the cell membrane's ability to regulate what enters and leaves the cell?

  • Cell adhesion
  • Selective permeability (correct)
  • Cell movement
  • Cell division

    • What is the basic structure of the cell membrane called?

  • Carbohydrate matrix
  • Fluid mosaic model
  • Phospholipid bilayer (correct)
  • Cholesterol layer

    • What explains the fluidity and lateral movement of components in the cell membrane?

    <p>Fluid mosaic model</p> Signup and view all the answers

    Which macromolecules are NOT mentioned as components of the cell membrane in the text?

    <p>Nucleic acids</p> Signup and view all the answers

    What is the amphipathic nature of phospholipids most closely associated with in the cell membrane?

    <p>Arrangement in a bilayer</p> Signup and view all the answers

    Which of the following is NOT a function of proteins in the cell membrane?

    <p>Synthesis of phospholipids</p> Signup and view all the answers

    What is the main function of the cell membrane?

    <p>Acting as a physical barrier</p> Signup and view all the answers

    How do channel proteins differ from transport proteins in the cell membrane?

    <p>Transport proteins can be regulated to open during certain times</p> Signup and view all the answers

    What is the role of carbohydrates on the outside of the cell membrane?

    <p>Acting as a nametag for cell identification</p> Signup and view all the answers

    What is the role of insulin in regulating glucose transport?

    <p>Activates GLUT4 transport proteins</p> Signup and view all the answers

    How do signaling molecules outside the cell initiate changes inside the cell?

    <p>Bind to receptors and cause changes in protein activation</p> Signup and view all the answers

    What effect does growth hormone binding to cell receptors have?

    <p>Causes changes in signal transduction</p> Signup and view all the answers

    How does the cell membrane contribute to cell movement and adhesion?

    <p>By interacting with the extracellular matrix and other cells</p> Signup and view all the answers

    What is the function of integral proteins embedded in the cell membrane?

    <p>Connect the cytoskeleton to external components</p> Signup and view all the answers

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