Cell Transport and Endocytosis
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Questions and Answers

What is the main component of a plasma membrane?

  • Protein
  • Carbohydrates
  • Phospholipid (correct)
  • RNA
  • What is the hydrophilic part of a phospholipid molecule?

  • Fatty acid tails
  • Glycerol and phosphate group (correct)
  • Protein molecules
  • Cholesterol
  • Why do phospholipids arrange themselves in a specific way in a membrane?

  • Because one side of the phospholipid is hydrophobic and repels the aqueous environment (correct)
  • To facilitate endocytosis
  • To facilitate active transport
  • To regulate osmosis
  • What is the approximate thickness of a cell membrane?

    <p>7nm</p> Signup and view all the answers

    What type of molecules are the tails of a phospholipid?

    <p>Non-polar</p> Signup and view all the answers

    What is the main purpose of carrier proteins in membrane transport?

    <p>To facilitate diffusion of specific molecules</p> Signup and view all the answers

    What is the term for the movement of free water molecules through a partially permeable membrane?

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

    What is the role of ATP in active transport?

    <p>To provide immediate energy for active transport</p> Signup and view all the answers

    What is the main function of the fluid mosaic model of membrane structure?

    <p>To explain the structure of the cell membrane</p> Signup and view all the answers

    What is the term for the process in which cells take in molecules from outside the cell?

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

    What is the term for the process in which cells release molecules outside the cell?

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

    What is the movement of water from an area of high water potential to an area of low water potential through a partially permeable membrane?

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

    What is the process by which cells take in solid material from outside the cell?

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

    What is the term for the movement of molecules from an area of high concentration to an area of low concentration without using energy?

    <p>Passive transport</p> Signup and view all the answers

    What is the term for the 'tendency of water to move out of a solution by osmosis'?

    <p>Water potential</p> Signup and view all the answers

    What is the process by which cells release substances out of the cell that have a function rather than being a waste product?

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

    What is the structure of the cell membrane that allows it to regulate what enters and leaves the cell?

    <p>Phospholipid bilayer</p> Signup and view all the answers

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