Refer to the accompanying figure. Which best describes the red blood cells in Figure B?

Refer to the accompanying figure. Which best describes the red blood cells in Figure B?
  a. These red blood cells have been placed in an isotonic solution.
  b. These red blood cells have swollen in response to a hypertonic external solution.
  c. These red blood cells have swollen in response to a hypotonic external solution.
  d. These red blood cells have shrunken in response to a hypertonic external solution.
  e. These red blood cells have shrunken in response to a hypotonic external solution.

Question 2

When the net movement of water in and out a cell is zero, that solution is said to be:
  a. osmotic
  b. isotonic
  c. hypotonic
  d. hypertonic
  e. pressurized