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Title: A Closer look at the Cell Membrane
Description: Detailed notes on Cell Theory, What the Cell Membrane is, What Makes it up, How nutrients and water get in and out of a cell, The cell and osmosis, and much more!
Description: Detailed notes on Cell Theory, What the Cell Membrane is, What Makes it up, How nutrients and water get in and out of a cell, The cell and osmosis, and much more!
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A Closer Look at the Cell Membrane
1665 Robert Hooke discovered cells in cork
1674 Leeuwenhoek first described living cells “animalcules”
Cell Theory
All organisms are made of cells
All existing cells are produced by other cells
The cell is the most basic unit of life
Cell Membrane
Protective barrier that encloses cell
Fluid and flexible
Contains proteins, lipids (not water soluble), and two layers of phospholipids
Selective permeability
Phospholipid
Lipid
Proteins & Lipids
Some of the proteins and lipids control the movement of materials into and out of the cell
Some proteins are “passageways” that allow nutrients & water into the cell and move wastes
out of the cell
How do nutrients and water get in and out of a cell?
Diffusion: movement of material from high to low concentration (diffusion of water = osmosis)
The cells of organisms are surrounded and filled with fluids that are mainly water
Cell membrane is semipermeable: only certain substances can pass through
...
Plasma is made up of water, salts, and other
particles
Title: A Closer look at the Cell Membrane
Description: Detailed notes on Cell Theory, What the Cell Membrane is, What Makes it up, How nutrients and water get in and out of a cell, The cell and osmosis, and much more!
Description: Detailed notes on Cell Theory, What the Cell Membrane is, What Makes it up, How nutrients and water get in and out of a cell, The cell and osmosis, and much more!