Cell Membranes

Description

A mind-map covering cell membranes and transport within them.
kit cecilia
Mind Map by kit cecilia, updated more than 1 year ago
kit cecilia
Created by kit cecilia about 7 years ago
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Resource summary

Cell Membranes
  1. plasma membranes
    1. fluid mosaic model
      1. proteins move around the mosaic of phospholipids
      2. phospholipids
        1. form a bilayer through which certain substances can pass
          1. carbon dioxide
            1. oxygen
              1. small lipids
              2. hydrophilic head that points out, hydrophobic fatty acid tail that points in
                1. cholesterol binds to the tails
                  1. pack closer together
                    1. resist effects of temperature change
                      1. membrane becomes less fluid and more rigid
                    2. intrinsic proteins
                      1. channel proteins
                        1. allow passive movement of ions and molecules
                        2. carrier proteins
                          1. change shape to carry specific molecules by passive or active transport
                        3. extrinisic proteins
                          1. may be attached to carrier proteins
                            1. functions as
                              1. antigen
                                1. enzyme
                                  1. receptor site for hormone (signalling molecule)
                                2. glycocalyx
                                  1. glycoproteins
                                    1. form hydrogen bonds with water to add stability
                                      1. help cells adhere together
                                        1. cell signalling
                                          1. act as receptor molecules for binding of hormones/neurotransmitters
                                            1. insulin receptors in liver or muscle
                                              1. acetylcholine at nerve synapses
                                          2. glycolipids
                                            1. antigens that allow cells to recognise each other as self or non-self
                                              1. white blood cells
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