Laura Whitfield and Brianna Strausser

Cell Structure

Cell Organelles

  • Organelles are things in the cell that have a specific job.
  • They are like the organs of the cell


The organelles of a cell

  • Nucleus-Holds the DNA of a cell and gives other organelles instructions on how to function
  • Nucleous- Makes ribosomes
  • Nuclear membrane- protects the nucleus
  • Rough er- has ribosomes and moves things in the cell
  • Smooth er- no ribosomes and moves things in the cell
  • Golgi body- prepares things for export
  • Ribosomes- makes proteins
  • Lysosome- digestion system of the cell
  • Chloroplast- photosynthesis
  • Cell membrane- protects cell
  • Mitochondria- makes energy
  • Cell wall- protects and gives structure
  • Cytopasm- nutrients and support
  • Vacoule- storage for water
  • Centrioles- give structure

Lipid Bilayer

  • Made of phospholipids.
  • Heads are hydrophillic.
  • Tails are hydrophobic.
  • Heads are polar.
  • Tails are not polar.
  • Lipid Bilayer is a major component of the cell membrane.
  • Has channels in it for things to go in and out.


Cell Transport

Passive Trasport:


  • Needs no energy.
  • Has diffusion (Evening out number of molecules on each side).
  • Osmosis has water.
  • Facillitated diffusion needs a protein.

Active Transport:

  • Needs energy.
  • There is the Na/K pump (exports salt, brings in potassium).
  • Endocytosis (eats away, helps with digestion).
  • Exocytosis (large particles are entered into the cell).

In Da Club - Membranes & Transport: Crash Course Biology #5