Lab 2- Brownian Movement
Relationship of osmotic pressure and concentrations of solute
A solute with high solute concentration will have a higher osmotic pressure than one with a low solute concentration
What was the starch used in filtration experiment
CuSO4
What moves via diffusion
O2 and CO2
What's the relationship between temperature and Brownian Movement?
as temp increases, molecules move more rapidly
How are solutions separated by selectively permeable membranes often compared?
based on amount of solute dissolved in each solvent
Why does osmosis occur across a selectively permeable membrane
because it can move freely across it
What is the external force during kidney function
blood pressure
Osmosis
diffusion of water
What happens in the blood involving blood cells
erythrocytes and leukocytes are isotonic to plasm surrounding them, so they do not shrink or swell
What does filtration require
external force
What is the "membrane" in this experiment?
filter paper
How does water move?
from high concentration to low concentration
What is the external force in this experiment
gravity
Hypertonic solution
higher solute concentration lower water concentration
What does increasing SA do to membrane
increase the rate at which diffusion occurs
What did we observe
india ink under a light microscope
Diffusion is passive. What does this mean?
it does not require ATP
What's involved in filtration
kidneys
What can also make diffusion occur faster
larger gradient between 2 areas
Hypotonic
lower solute concentration higher water concentration
What are the selectively permeable membranes during kidney function
membranes of glomerulus and bowman's capsule
Brownian Movement
molecules are in constant motion as a result of the energy they possess
Diffusion
movement of particles from high concentration to low concentration
Water in water
no net movement, isotonic
solutes
particles that cannot pass through a selectively permeable membrane
filtration
separation of molecules based on size
isotonic
solute concentrations are equal
hypertonic
solution with higher solute concentration
hypotonic
solution with lower solute concentration
What is brownian movement dependent on
temperature
solvent
the water that solutes are dissolved in
Where will water move towards
toward hypertonic solution
How do plasma proteins act as solutes within blood
water will diffuse into blood vessels from surrounding tissues, helping to maintain blood volume
Placing 10% NaCl in water
water will move into tube and tube will swell; hypertonic
Placing 1 % NaCl in water
water will move out of the tube and tube will shrink; hypotonic
1% NaCl in 10% NaCl
water will move out of tube and tube will shrink; hypotonic
