Please enable JavaScript.

Coggle requires JavaScript to display documents.

CELL MEMBRANE, examples, Doesn't need energy - Coggle Diagram

- - - - present in eukaryotic cells
  - - - for this
        
        proteins pull a small section of the membrane, using ATP.
  - - - can release materials from cells
    - - vesicle fuses with plasma membrane
        
        contents are released of the membrane
    - - expel waste products
- - - - Diffusion from an area of higher concentration to a lower one
        
        only happen if the phospholipid bilayer is permeable to the particles.
      - What can move?
        
        hydrophobic and lipophilic nature, of small size and without electric charge.
      - no energy used
    - - Water is able to move
      - Water molecules pass through a membrane
      - No energy required
      - due to
        
        concentration gradient
        
        in
        
        substances dissolved in water
      - Types
        
        Isotonic
        
        same number of
        dissolved particles
        
        than
        
        Hypertonic
        
        higher
        concentration of
        dissolved particles
        
        than
        
        Hypotonic
        
        lower
        number of dissolved
        particles
        
        than
        
        the cell cytoplasm
    - - channels
        
        holes with a very narrow diameter.
        
        from a higher to a lower concentration
        
        only one type of particle passes (not both)
      - Channels for particles to pass
      - Free movement through specific channels.
    - - ATP energy required
      - Cell sometimes take in substances, it is absorbed against the concentration gradient.
      - by
        
        proteins in membranes (pump proteins)
  - - - Difference in concentration of a substance on two sides of a membrane.