Osmosis and Red Blood Cells (Pg. 121-123)

The human blood contains how much NaCl?

0.9%

How does a normal red blood cell appear under a microscope?

A concave saucer

Hypotonic

A solution that has a lesser concentration than the red blood cells ; water molecules will diffuse INTO the red blood cells causing the red blood cells to hemolyze (swell up and burst)

Hypertonic

A solution that has a rester concentration than the red blood cells ; water molecules will diffuse OUT of the red blood cells, causing the red blood cells to crenate (shrivel and shrink)

Isotonic

A solution with the same concentration as the red blood cells; there is no net movement of water between the cell and its environment

If you can read the print through the test tube the ______ has occurred?

Hemolysis

If the blood still looks cloudy and opaque then ______ has ____ occurred?

Hemolysis ; not

Blood is added to a 3% NaCl solution, would you expect hemolysis, crenation, or neither to occur? Why?

Hemolysis because there is more water in the solution

Hypertonic solution result

Hemolyzed (exploded)

In which type of solution does hemolysis occur?

Hypertonic

Which of the three solutions would cause irreversible damage to the blood cells?

Hypertonic

In which test tube did hemolysis occur?

Hypotonic

If a solution were to be injected intravenously into a patient should be isotonic, hypotonic, or hypertonic? Why?

Isotonic because it can cause equilibrium in the red blood cells

Blood is added to a 0.1% NaCl solution, would you expect hemolysis, crenation, or neither to occur? Why?

Neither because there is less water in the solution

Isotonic solution result

Normal

Hemolysis

Red blood cell membrane is swelling up > bursting

Why did the hemolyzed blood transparent?

Concentration is lower outside than inside the cell and there is less space being taken up

Hypotonic solution result

Crenated (shrunk)

Unknown ABC solution result

Crenated (shrunk)