significance of surface area to volume ratio

• what is the definition of respiration


  a series of chemical reaction resulting in the releases of energy
• give 2 examples of nutrients that are supplied by gas exchange


  oxygen and glucose
• give 2 examples of waste products that are removed through gas exchange


  carbon dioxide and urea
• what form of energy is released from respiration

  atp
• what is the definition of gas exchange


  the process of bringing oxygen into cells and removing carbon dioxide from them
• what is the definition of ventilation


  the process of bringing air to and from an exchange surface
• How are gasses exchanged?

  diffusion
• what is ficks law

  (Surface Area x Concentration Gradient)/Thickness
• what happens as a cell increases in size in terms of diffusion


  the diffusion pathway gets longer and the rate of diffusion will slow down
• what is the difference between multi cellular and unicellular


  a unicellular organism is made from one cell
• what is the relation ship between the size of an organism and its surface area to volume ration


  as the size of the organism increases the surface area to volume ratio decreases
• what is meant by surface area to volume ratio


  Is the amount of surface area per unit volume of an object
• why is a good surface area to volume ratio needed


  to supply nutrients and remove waste by diffusion