Identify Relationships Between Closely Related Concepts Practice Test

A comparative study examines two red blood cell suspensions placed in solutions separated by a semipermeable membrane permeable to water but not to sucrose. In Trial 1, the external solution is 300 mOsm sucrose; in Trial 2, it is 600 mOsm sucrose. Assume intracellular osmolarity is initially 300 mOsm and that sucrose does not cross the membrane. Which outcome would most likely result from the relationship between osmotic pressure and colligative properties in this biological setting?

A predictive model describes drug distribution between plasma and a lipid compartment. A weak acid (HA) with $pK_a = 4.0$ is administered intravenously. In an inflamed tissue region, extracellular pH drops from 7.4 to 6.4 while plasma remains at pH 7.4. Assume only the neutral form (HA) readily crosses membranes, and that ionized A$^-$ is effectively trapped in aqueous compartments. Which outcome would most likely result from the described relationship between ionization (pH vs $pK_a$) and partitioning (membrane crossing and trapping)?