Human Red Blood Cells (RBCs) and Rabbit RBCs Are Equilibrated $\quad$

Human red blood cells (RBCs) and rabbit RBCs are equilibrated in separate solutions of isotonic saline (300 mOsm/L NaCl). The human RBCs are then placed in a solution of 300 mOsm/L glycerol, which causes them to swell and burst. However, rabbit RBCs placed in 300 mOsm/L glycerol neither swell nor shrink. Based on this information, which of the following can be concluded about a 300 mOsm/L solution of glycerol for the different cell types? $\quad$ $\quad$$\underline{\text { Human RBCs}}$$\quad$$\quad$$\quad$$\quad$$\quad$ $\quad$ $\quad$ $\quad$ $\underline{\text {Rabbit RBCs}}$
A. $\text {Hypertonic and hyperosmotic}$ $\quad$ $\text {Hypotonic and hypoosmotic}$
B. $\text {Hypotonic and hypoosmotic}$ $\quad$ $\text { Hypertonic and hyperosmotic}$
C. $\text {Hypotonic and isoosmotic}$ $\quad$$\quad$ $\text { Isotonic and isoosmotic}$
D. $\text { Isotonic and hypoosmotic}$ $\quad$$\quad$$\text { Isotonic and hyperosmotic}$
E. $\text {Isotonic and isoosmotic}$ $\quad$$\quad$$\quad$$\text { Hypotonic and isoosmotic}$
F. $\text {Isotonic and hyperosmotic}$ $\quad$$\quad$$\text { Isotonic and isoosmotic}$