Assessments for Learning Outcome: Students will apply the concept of osmosis to different body
systems and different disease states.
Formative Assessments (5)
#1 Pre-Class Online Quiz (Basic concepts)(Taken from published Diffusion and Osmosis CI)
1. All cell membranes are
a. Semipermeable.
b. Permeable.
2. The reason for my answer is because cell membranes
a. Allow free movement of materials into or out of the cell.
b. Allow some substances to enter the cell, while they prevent all substances from leaving.
c. Allow only beneficial materials to enter the cell.
d. Allow some substances to pass through, but not others.
3. In this figure, two columns of water are separated by a semipermeable membrane through
which only water molecules can pass. Side 1 contains brown dye and water, Side 2 contains
pure water. After two hours, the water
level in Side 1 will be …
a. Higher than in Side 2.
b. Lower than in Side 2.
c. The same height as in Side 2.
4. The reason for my answer is because
a. Water will move from high to low
solute concentration.
b. Water flows freely and maintains
equal levels on both sides.
c. The concentration of water molecules is less on Side 1.
d. Water moves form low to high water concentration.
5. When a living human blood cell is placed in pure fresh water, the cell will
a. Shrivel up.
b. Swell and burst.
c. Remain the same.
6. The reason for my answer is because
a. Water molecules move from higher concentration of dissolved particles to lower
concentration of dissolved particles.
b. A cell has homeostasis and will maintain itself.
c. The cell loses stability outside the human body.
d. Water molecules move from higher concentration of water to lower concentration of
water.
#2 Individual+Group Quiz
Complete the following questions. Write your responses on a slip and turn them in with your name.
After each member of your group has completed the questions, work together to answer the questions
again. Discuss your responses and come to a consensus. Fill out your scratch off sheet to reveal the
answers and your group score. It is okay if your group answers don’t match your individual responses
you turned in!
1. Refer to the Figure: If the concentration of solutes (salts, sugars,
proteins) is the same on side A and side B what will happen to the
water molecules?
a. They will be bouncing around randomly, some will move
back and forth, but overall the amount of water on both
sides will remain equal.
b. Nothing, there will be no movement of water molecules
because there is no difference in solute concentration across the membrane.
c. Salt molecules will begin attracting one another through ionic forces. Salt molecules will
start to clump together on one side of the membrane. This will draw water toward that side
of the membrane.
d. Salt molecules will begin attracting one another through ionic forces. Salt molecules will
start to clump together on one side of the membrane. This will draw water toward the
opposite side of the membrane to balance the salt movement.
2. Refer to the Figure: If the concentration of solutes (salts, sugars, proteins) is higher on side A than
side B what will happen to the water molecules?
a. There will be an overall movement of water from side B to side A.
b. There will be an overall movement of water from side A to side B.
c. Nothing, the movement of water does not depend on the solute concentration.
3. Refer to the Figure: If the concentration of solutes (salts, sugars, proteins) is higher on side A than
side B what will happen to the solute molecules?
a. The solute molecules on side A will begin to clump together drawing more solute molecules
toward side A.
b. Water molecules will move to side A to dissolve and carry the salt and sugar across the
membrane to Side B until solute and water are equal.
c. The solute molecules will be bouncing around randomly but they will be unable to move across
the membrane down their concentration gradient.
#3 Small Group Activity (linked water compartments) actually this will probably not be assessed…
#4 Small Group Activity (body systems and diseases)
Hyponatremia in athletes
Reading:
Group activity with IF-AT slips-PowerPoint multiple choice questions (posted on the wiki)
Walks through the consequences of drinking excess water, sample slide:
#5: Individual LMS quiz
Multiple choice questions applying osmosis to cystic fibrosis (Not written yet)
UNDER DEVELOPMENT: (disease application) cystic fibrosis, pancreas impact (thicker mucus clogs ducts
in the pancreas preventing release of enzymes to the gastrointestinal tract
Summative Assessment (1) (yet to be written)
Basic multiple choice questions from concept inventory
Application to Ecstasy and hyponatremia
Application to enterotoxins and diarrhea