diffusion Flashcards
what is diffusion
diffusion is the net movement of particles from a higher concentration to a lower
what type of process is diffusion
it is a passive process
which molecueles are small enough to pass through the membrane
glucose and oxygen
which molecules are not big small enough to pass through the membrane
starch and proteins
which organisms use diffusion
multi and singular celled organisms
how does a singular celled organism use diffusion
a singular celled organism uses diffusion by taking molecules from the air into the body
how does a multi-celled organism use diffusion
a multi-cellular organism can not use diffusion by it self but instead they have made adaptations eg: the root hair cells on a plant
which factors effect diffusion
the temperature, the distance between the molecules, the concentration gradient and the surface area to volume ratio
how does the temperature affect diffusion
the higher the temperature the faster the particles move due to the increase in kinetic energy allowing the particles to collide more often
how does the distance between the molecules affects diffusion
the further away the molecules are the less likely they are to collide and diffuse
how does the surface area affect diffusion
the higher or bigger the surface area is the more room the particles which results in more particle collisions
how does the concentration gradient affect diffusions
the greater the concentration the faster the rate of diffusion
what is the concertation gradient
the concentration gradient is the difference between the concentration of a substance between two or more points
