Category H35—Other Retinal Disorders—has what type of instructional note?

Where does ammonia play its most important role as a base buffer?

a. Kidney b. Liver c. Lung d. Vasculature

What is the term for the passive movement of gas molecules from a high partial pressure to an area of low partial pressure until equilibrium is reached?

A. pressure gradient B. osmosis C. diffusion D. active transport