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Bio 351 plasma membrane extra credit

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  • We will learn about the basic structure of the plasma membrane.
  • Before we move on, students should write down what this quote means to them and why this is important. (There is no wrong answer)
  • Questions: 1) Why do you think the plasma membrane is important to the cell? 2) Can you think of a few functions of plasma membrane?
  • Have students draw their own plasma membrane to better understand its structure.
  • Transcript

    • 1. By: Ismael Rodriguez
    • 2. > The cell is the smallest unit of life classified as a living thing.> It is the structure of all living things on earth.> We will focus on the structure of the plasma membrane of thecell and some of its basic functions.
    • 3. > The plasma membrane is a thin membrane that surrounds and defines theboundaries of all living cells.> It consists of a double layer, also know as the bilayer, of phospholipids withvarious proteins attached to it.> Cell membranes define and compartmentalize space, regulate the flow ofmaterials, detect external signals, and mediate interactions between cells.
    • 4. PROTEINS IN THE CELL PLASMAMEMBRANE> In the plasma membrane we have peripheral proteins and integral proteins.> Integral proteins penetrate the bilayer from the extracellular fluid to the cytoplasm.> Peripheral proteins are attached to the integral proteins and don’t cross themembrane.
    • 5.  The plasma membrane acts as a barrier and separates the outsideof the cell from the inside. It is selectively permeable to ions and inorganic molecules,meaning it controls the movement of molecules in and out of thecell.
    • 6. >The plasma membrane is mainly composed ofphospholipids.>The polar heads are hydrophilic and the nonpolar tailsare hydrophobic.
    • 7.  Cholesterol helps maintain the integrity of the membranes and plays animportant role in facilitating cell signaling so that the cells can communicatewith each other.
    • 8. 1st2nd3rd4th> The break down from the cell to thephospholipids.
    • 9. QuizTimeA B C DEFFirst: Draw your own plasma membraneSecond: Label Letters A-F, for B and C what type of proteins arethey?Third: For letter E state the hydrophobic and hydrophilic sections.Fourth: State where the cytoplasm and the extracellular fluid are
    • 10. > This website is a great place for students who areinterested in looking at the plasma membrane in moredetail.http://www.bio.davidson.edu/people/macampbell/111/memb-swf/membranes.swfFurther Information