diffusion Flashcards
what is the need for transport
to remove waste products out of organisms to prevent them from accumulating
what happens if excess urea is not removed from the body
it becomes toxic
what happens is excess carbon dioxide build up and dissolve in the blood
it becomes acidic, leading to acidosis
do larger organisms have a smaller of larger surface area to volume ratio
smaller
what is diffusion like in larger organisms
slower and less efficient
do smaller organisms have a smaller or larger surface area to volume ratio
larger
what is diffusion like in smaller organisms
quicker and more efficient
what happens to to the rate of energy loss of the surface are to volume ration is greater
greater range of energy loss
what do animals living in cold conditions need and why
smaller surface area to volume ratio to conserve heat so less heat is lost through diffusion
how do alveoli have a large surface area
there are many alveoli and are arranged in clusters
how is the concentration gradient maintained in the alveoli
capillaries provide a large blood supply
how is there a short diffusion distance in the alveoli
capillary walls are one cell thick
what are the factors that affect the rate of diffusion
- concentration gradient
- temperature
- surface area
how does concentration gradient affect rate of diffusion
the greater the different in concentration, the greater rate of diffusion
how does temperature affect rate of diffusion
greater temperature means greater movement of particles resulting in more collisions and faster rate of diffusion
