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Tour of the cell, membrane structure and fuction (Active transport…

- - - - Protein that speeds up the movement of water and solute across a membrane down its concentration gradient. Ion channels facilitate the diffusion of ions through a membrane. Proteins can undergo changes in shape that translocate bound solutes across a membrane.
    - - Process in which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one.
    - - Crossses through and between phospholipids.
- - - - network of membranes sacs and tubes: active in memebrane
    - - Nucleolus: Non membranous structure in production of ribosomes a nucleus has once or more nucleoli.
      - Nuclear envelope: double membrane enclosing the membrane , perforated with pores continuous with ER.
      - consist of DNA
  - - - Nucleous
      - Nuclear envelope
      - Chromatin
    - - Outer layer that protects and maintains the shape from mechanical changes: made of cellulose , and other polysaccharides.
    - - cytoplasmic channel through cell walls that connect the cytoplasm of adjacent cells.