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Transport In Cells
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Passive Transport
Diffusion
Facilitated Diffusion
Osmosis
No Energy Required
Diffusion(def.)
net movement of molecules form a region of
high
concentration to
lower
concentration
Diffusion
Concentration Gradient
: molecules move down this (how much)
Equilibrium
: diffusion molecules reach this when they are evenly spread out
Passive
: no energy needed
How to Change the Rate of Diffusion
1. Change the concentration gradientÂ
2 Increase the temperature
3. Increase surface area
4. Change the type of molecule diffusing
Oxygen, Carbon Dioxide, Water= Diffuse Easily
Facilitated Diffusion
high to low
no energy for =
protein channel (integral)
large molecules
Osmosis
diffusion of H
2
O
movement of H
2
O from high to low
concentrations have to be the same on both sides
same % of solution
Hypotonic Solution
concentration
inside
cell is
greater
than
outside
more water enters the cell than is leaving the cell
hypo-hippo
swells
Isotonic
concentration inside cell is
equal
to outside cell
same size
water entering=water leaving
Hypertonic
concentration
inside
the cell is
less
than
outside
the cell
more water leaving cell than entering cell
shrinks
Animal v. Plant(Hypo/Iso/Hyper)
Examples
Grocery stores spray water on fruits/vegetables to "plump" them up
being in water causes fingers/toes to wrinkle when water ENTERS your skin; bathwater is HYPOTONIC compared to your skin
Author
adriana321
ID
243072
Card Set
Transport In Cells
Description
Transport
Updated
2013-10-27T03:13:16Z
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