structure and function

• plasma membrane structure


  wall outside of the cell
• plasma membrane function


  protects the cell from its surroundings, allows substances in and out
• cytoplasm structure


  contains many dissolved substances, liquid that fills cell
• cytoplasm


  lots of chemical reactions happen in it
• nucleus structure


  has nuclear pores, surrounded by double membrane
• nucleus function?


  organelle that contains cell's dna and is control centre of cell
• nucleolus structure


  region of dense dna
• nucleolus function


  produces ribosomes
• ribosomes function


  given instruction for a protein and get job done, make proteins
• rough endoplasmic reticulum structure

  flattened sacs with membrane covered in ribosomes
• rough endoplasmic reticulum function

  where proteins are made
• smooth endoplasmic reticulum structure

  membrane tubes
• smooth endoplasmic reticulum function

  where lipids are made
• vesicles function


  small membrane bound sac for storing and transporting substances in cell
• gogli apparatus


  modifies proteins and packages them in vesicles for transport
• lysosomes structure


  enclosed by single membrane
• lysosomes function


  enclosed by single membrane
• lysosomes function


  destroys old organelles and pathogens
• centrioles structure


  two hollow tubes at right angles to each other
• centrioles function


  make the spindle in cell division
• mitochondria structure


  surrounded by double membrane, inner membrane has folded projections to increase surface area
• mitochondria function


  where respiration happens and ATP is produced
• mitochondria structure


  central area contains jelly called matrix, contains ribosomes and dna