Lab 2- Brownian Movement

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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


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