SA : vol ratio Flashcards
(9 cards)
what makes a large SA : vol ratio
- being smaller
- having folding
why is it good to have large SA : vol ratio?
more surface for exchange, smaller diffusion distance
how to simplify SA: vol ratio
SA divide by Vol
what factors affect diffusion?
temperature
SA : vol ratio
conc gradient
short diffusion pathway
moisture
why does higher temp mean faster diffusion and what to look for?
particles have more kinetic energy, increased speed
- look for = passing close to blood
SA : vol ratio - why does it increase diffusion
shorter diffusion distance, increased surface
look for = folding, small
why does high conc gradient affect diffusion?
greater difference in concernation
look for = good blood supply
why does short diffusion pathway affect diffusion?
shorter distance, diffuse faster
look for = one cell thick walls, close together
why does moisture affect diffusion
increased diffusion in liquids
look for = presence of mucus
