Copy of Review and Virtual Labs - Diffusion and Osmosis (5/28/2026)

Last updated about 3 hours ago

58 questions

https://www.wisc-online.com/learn/natural-science/life-science/ap1903/the-cell-passive-transport-diffusion

https://www.wisc-online.com/learn/natural-science/life-science/ap11003/the-cell-passive-transport-osmosis

Go to the following hyperlink:

http://www.glencoe.com/sites/common_assets/science/virtual_labs/LS03/LS03.html

Read the general information on the side panel which also has instructins for how to do the lab. Move each of the specimens into the three solutions and record your observations in the next question boxes.

	Hypotonic Solution	Hypertonic Solution
Plant Cell - Elodea	the central vacule swells, but the cell wall prevents the cell from bursting	inside of cell shrinks and pulls away from the cell wall; cell walls stay in place
Animal Cell - Human blood	swells and eventually lyses (breaks apart)	cell shrinks and gets smaller and smaller until it dies

	Hypotonic Solution	Hypertonic Solution
Plant Cell - Elodea	the central vacule swells, but the cell wall prevents the cell from bursting	inside of cell shrinks and pulls away from the cell wall; cell walls stay in place
Animal Cell - Human blood	swells and eventually lyses (breaks apart)	cell shrinks and gets smaller and smaller until it dies

Copy of Review and Virtual Labs - Diffusion and Osmosis (5/28/2026)

Copy of Review and Virtual Labs - Diffusion and Osmosis (5/28/2026)

Diffusion is

At the very beginning, how does the concentration of the blue particles on Side A compare to that of Side B?

Kinetic energy allows molecules to

Net diffusion moves down the concentration gradient from areas of

Eventually the two sides will come to equilibrium which is when the concentration of particles are equal on both sides.

What happens to the movement of molecules when the temperature is raised?

What happens to the movement of molecules when their temperature is lowered?

Video Diffusion Q1: Simple diffusion is defined as the movement of

Video Diffusion Q2: When sugar is mixed with water, equilibrium is reached when

Video Diffusion Q3: The rate of diffusion is affected by which of the following?

Video Diffusion Q4: The molecules in a solid lump of sugar do not move.

Video Diffusion Q5: Diffusion is one of the processes whereby materials are exchanged between a cell and its environment.

Osmosis is

Compared to simple diffusion which is the movement of particles, osmosis is only the movement of water through a semipermeable membrane.

The dashed line in the beaker separating the two sides represents the semipermeable membrane.

Why is the assumption made that the large molecules will stay on their own side of the membrane?

Because molecules will move from one side to another to come into equilibrium, the concentration of water moves from side B to side A. Therefore, the water level on side A goes

In living organisms, cells must be in an ____________ solution where water leaves and enters the cell at the same rate.

If a cell is placed in an hypertonic environment (you need to click on the "View Movie" in the simulation to observe), then an animal cell will

If a cell is placed in an hypotonic environment (you need to click on the "View Movie" in the simulation to observe), then an animal cell will

Video Osmosis Q1: Osmosis is best defined as the movement of

Video Osmosis Q2: Which of the following will pass through a cell membrane most easily?

Video Osmosis Q3: A red blood cell placed in a hypertonic medium will

Video Osmosis Q4: A 5% urea solution is hypotonic to a 10% urea solution.

Video Osmosis Q5: If a cell is placed in an isotonic medium, there will be no net movement of water.

Human blood cell - appearance in hypotonic solution

Human blood cell - net movement of water in hypotonic solution

Human blood cell - appearance in isotonic solution

Human blood cell - net movement of water in isotonic solution

Human blood cell - appearance in hypertonic solution

Human blood cell - net movement of water in hypertonic solution

Elodea (plant cell) - appearance in hypotonic solution

Elodea (plant cell) - net movement of water in hypotonic solution

Elodea (plant cell) - appearance in isotonic solution

Elodea (plant cell) - net movement of water in isotonic solution

Elodea (plant cell) - appearance in hypertonic solution

Elodea (plant cell) - new movement of water in hypertonic solution

Paramecium (single celled prokaryote) - appearance in hypotonic solution

Paramecium (single celled prokaryote) - net movement of water in hypotonic solution

Paramecium (single celled prokaryote) - appearance in isotonic solution

Paramecium (single celled prokaryote) - new movement of water in an isotonic solution

Paramecium (single celled prokaryote) - appearance in hypertonic solution

Paramecium (single celled prokaryote) - new movement of water in a hypertonic solution

Paramecium belong to the Kingdom Protista. Since you observed how the paramecium responded in the different solutions, predict whether paramecium are more closely related to the Animal Kingdom or the Plant Kingdom.

Review Question: All three of these cells share the following characteristics: have a cell membrane, have cytoplasm, have genetic material, and have ribosomes.

If you were sick and in the hospital, especially with something like the flu where you might become dehydrated, you may receive an IV of saline solution to return your body to homeostasis. What is the concentration of the IV saline (salt) solution?

Often movies or stories tell about a person ship-wrecked on an island or stranded on a life raft in the ocean without any access to fresh water. Explain why drinking the ocean water isn't a good idea.