The Cell Lecture 4

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  • Created by: saraht83
  • Created on: 29-04-16 10:56

1. What do tight junctions do?

  • link adjacent muscle cells, restrict protein migration, prevent substances moving through intercellular space
  • link adjacent epithelial cells, restrict protein migration, prevent substances moving through intercellular space
  • link adjacent endothelium cells, restrict protein migration, prevent protein synthesis
  • link adjacent muscle cells, restrict protein synthesis, prevent substances moving through intercellular space
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2. Are peripheral membrane proteins embedded?

  • no
  • yes

3. What do desmosomes do?

  • hold adjacent cells together, have thin plaques attached to cytoplasmic fibres and membrane cell adhesion proteins
  • hold adjacent cells together, have thin plaques attached to cytoskeleton and membrane cell adhesion proteins
  • hold adjacent cells together, have dense plaques attached to cytoplasmic fibres and membrane cell adhesion proteins
  • hold adjacent cells together, have dense plaques attacked to cytoskeleton and membrane cell adhesion proteins

4. What model describes the plasma membrane?

  • fluid mosaic model
  • fluid phospholipid model
  • phospholipid trilayer model
  • fluid bilayer model

5. What are connexons?

  • span membranes of two adjacent cells, made of desmosomes
  • span membranes of three adjacent cells, made of desmosomes
  • span membranes of two adjacent cells, made of connexins
  • span membranes of three adjacent cells, made of connexins

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