Biology Y9 Cellular Transport EoT test Flashcards
name 3 factors that affect the rate of diffusion
any 3 of: concentration gradient, temperature, diffusion distance, surface area
diffusion moves from an area of ______ concentration to an area of ______ concentration
higher, lower
what will the particles be in diffusion
dissolved gases and dissolved liquids
what is concentration
number of particles in a given volume
diffusion goes ______ the concentration gradient
down
if there are more particles inside an area than outside, diffusion will move ______ the area
out of
if there are more particles outside an area than inside, diffusion will move ______ the area
into
name 2 places, in which diffusion occurs in an animal
any 2 of: gas exchange at the alveoli, glucose absorption in the small intestines, glucose diffusion across the cell membrane
why does gas exchange occur in a plant
for photosynthesis
what is the relationship between temperature and diffusion
as temperature increases, particles diffuse faster
what gas exchanges are there at the alveoli
oxygen from air to blood, carbon dioxide from blood to air
what is the concentration gradient
the difference in particle concentration between 2 areas
what is the relationship between surface area and diffusion
as surface area increases, particles diffuse faster
what is osmosis
the movement of water from an area of high water potential to an area of low water potential across a partially/selectively permeable membrane
in osmosis ‘water follows ______’
solutes
