1
Q
what is meant by diffusion?
A
diffusion is the spreading out of particles from an area of higher concentration to an area of lower concentration.
2
Q
where does diffusion happen?
A
solutions and gases
3
Q
why does is only happen in solutions and gases?
A
because the particles in these substances are free to move about
4
Q
what is the rule between concentration and diffusion?
A
bigger concentration=faster diffusion rate
5
Q
can dissolved cells move in and out of your cells? yes or no?
A
yes
6
Q
what small molecules can diffuse through cell membranes?
A
oxygen, amino acids, water and glucose.
7
Q
what big molecules cannot fit through the membranes?
A
starch and protein
biology b2
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