Osmosis is the diffusion of across a membrane.
O Large molecules like glucose
Water
Small molecules like 2 and CO2
O Molecules like sodium and potassium

Nephrons, the functional unit of kidneys, are responsible for formation of urine. the sentences describe situations that are the result of problems in the urine formation process. for the nephron shown below, match each situation to the step in the urine formation process where the problem lies.