A2.2 (part 3) Flashcards
as cell sizes increase the
sa and volume increase
as cell size increase, the sa and volume ratio
decreases
the rate of heat production/waste/ressoirce comsumption of a cell is
a function of its volume
the rate of exchange of materials and energy is a function of its
and energy is a function of its surface area
if a cell grows to big its
center is too far from the membrane, taking nutrience longer to reach it
the diffusion rate
becomes to slow if a celll is too big to support its function
if a cell is too big it cant absorb
nutrience and o2 fast enough
and if it ebcomes to big it cant excrete
wastw like co2 fast enough or absorb fast enough
heat is not
lost fast enough if a cell is too big
and large cells are
structuarally weaker than smaller ones
cells which adapt their sa:v
red blood cells
root hair
intertinal vili
alveoli
leaves shape
AS THE SIZE OF A CELL INCREASES
THE SA:V RATIO DECREASES
myelin gene
makes it more electrically conductave and protects neurone from breaking down
nerve cell gene haassssss
respiratory enzyme gene
myelin
all cells have a
respiratory enzyme gene
