Chapter 4 Flashcards
Osmosis & Diffusion Experiment
Why did the mass of the dialysis tubing change over time?
Because there was a higher concentration inside the bag, which made the water move into the bag, increasing the mass.
Which solutes diffused out of the dialysis tubing?
Water, sodium chloride, sucrose, and iodine diffused out of the dialysis tubing because their molecular mass was below 1,000amu and could pass through the selectively permeable membrame.
Whic solute did not diffuse out of the dialysis tubing? why?
The starch did not diffuse out of the tubing because the molecular mass was way over 1,000amu
Were the conditions of this experiment hypertonic, hypotonic or isotonic?
Hypotonic
Explain what Hypertonic solution is
Concentration of solutes moves in
H20 moves out
Cell shape shrinks
Ex: Ocean water 4% salt
Explain what hypotonic solution is
Concentration of solutes moves out
H20 moves in
Cell shape swells = burst
Ex: pure distilled water
Explain what isotonic solution is
Concentration of solutes of are equal
H20 moves in and out at equal rates
Maintains cell shapes
Ex: Normal Saline 0.99%
What does lysis mean
Breaking apart
What is diffusion?
The movement of substances from areas to high and lower concentration
What is an example of diffusion?
Perfume, cologne, etc.
(Not just gases, but liquids as well)
Ex: Crystal light will disperse to lower concentration.
What is osmosis?
The movement of solvent (usually water) through a selectively permeable (certain things) membrane (coverings) from an area of lower to higher solute (dissolve) concentration.
(Permeable: Things can pass through)
(Go to the party with more people)
Is osmosis active or passive transport?
Passive transport
What is tonicity?
The ability of a solution to change the shape or tone of cells by altering the cells internal H20 volume.
What is passive transport?
No energy is required
Ex: Osmosis and diffusion
(think of a ball rolling down the hill)
What is active transport?
Energy required and usually in the form of ATP
