Introduction to the cell

• Cells = basic unit of organisms
•  cells arise from pre-existing cells from cell division (meiosis & mitosis)

  Growth & development result from incr. in the no. of cells & differentiation

   
• cytoplasm

  
  

  function= Supports & suspends organelles cellular molecules Protein synthesis, glycolysis & cell division occur
• cell membrane function

  • Acts as a barrier
  • Holds molecules inside cell
  • Maintains a unique intracellular pH environment
  • Responds to changes in the outside and inside of cell
  • Regulates movement
• cytoskeleton function

  It is the protein scaffolding of a cell

  • It preserves the shape of the cell

  • It also allows the cell to change shape if needs be

  • It provides a frame for movement of the cell
• endoplasmic reticulum functions

  • provides scaffolding for protein synthesis

   
• The golgi apparatus function

  • Modification of proteins and lipids through glocalization

   
• The mitochondrion function

  • Contains the enzymes of the electron transport chain
  • Plentiful in cells which contains large amounts of energy
  • Generates most of the ATP through oxidative phosphorylation
• Lysosome function

  • pH5 denatures proteins facilitating their degradation
  • Destroy aged cell organelles
  • Breaks down waste materials and cellular debris.