exam style Q

• relate the structure of the arteries to its function 


  muscular walls to withstand high pressure

  elastic tissue allows recoil

  narrow lumen to maintain pressure
• relate the structure of the veins to its function 


  thin walls due to low pressure

  valves to prevent backflow of blood

  less muscular walls and elastic tissue as they don't have to control blood flow
• relate the structure of the capillaries to its function

  walls are one cell thick for a shorter diffusion distance

  very narrow so that it can permeate tissue

  many and highly branched for large surface area
• give three examples of disaccharides

  maltose (2 glucose)

  sucrose (glucose and fructose)

  lactose (glucose and galactose)