(Solved): 1. The diagram below shows the relative concentration of oxygen and carbon dioxide in a blood capil ...

1. The diagram below shows the relative concentration of oxygen and carbon dioxide in a blood capillary and in a cell fed by that capillary. a. Which arrow, the white or the gray, indicates the direction that ${\mathrm{CO}}_2$ will move? b. What factor determinos the direction in which each gas is moving? 2. You are working for a pharmaceutical company and are testing drugs for possible use in tkin patcbes. Today your experiment involves terting the rate at which two similar drigs penetrate into an experimental skin-like membrane. Both drugs have the same lipid solubility. Drug A hait a molecular mass of 423 , and Drug B a molecular mass of 645 . What miglit you aaticipate to be the 3. In another experiment you are asked to test the ability of two chemical dyes to penetrate through a plastic membrane sac. Sac $\mathrm{X}$ contains a red dye, sac $\mathrm{Y}$ contains a blue dye. Each sac is suspended in a beaker of distilled water and allowed to sit. (see diagram) When you check your two beakers after an hour, you see that the beaker with sac X contains water that is red in color while the other beaker with sac $\mathrm{Y}$ has water that is clear. You also notice that $\mathrm{sac}\mathrm{Y}$ has increased in size a bit, while sac $\mathrm{X}$ is the original size. a. Explain why one beaker has changed color while the other ha b. Explain why one sac has changed size but the other has not. 4. The graphs below show data from two membrane transport experiments. One experiment studied the effect of solute concentration on the rate of simple diffusion while the other studied the effect of solute concentration on the rate of facilitated diffusion. In neither experiment has the diffusion of solute reached equilibrium. a. Which graph, A or B, is the data from the facilitated diffusion experiment? b. Explain why graph A differs from graph B.