Mr. Jessup, a 55-year-old man, is operated on for a cerebral tumor. About one month later, he complains that he is excessively thirsty and that he has been voiding almost continuously. A urine sample is collected, and its specific gravity is 1.001. What is your diagnosis of Mr. Jessup's problem, and how might it be related to his previous surgery?

The route by which substances are reabsorbed by crossing through the cells of the renal tubule and collecting system is known as the:

a. paracellular route.

b. transcellular route.

c. primary active transport route.

d. facultative route.

Predict the effects the following scenarios would have on glomerular filtration:

a. Having excess proteins in the blood, increasing colloid osmotic pressure

Predict the effects the following scenarios would have on glomerular filtration:

b. Having low arterial blood pressure (hypotension)

Normal urine should have which of the following properties? Circle all that apply.

a. Translucency

b. Yellowish pigment

c. Cloudy appearance

d. pH less than 4.5