25. The Urinary System

Which of the following is NOT a purpose of tubular reabsorption?

Which of the following solutes are primarily reabsorbed by primary active transport?

In the proximal tubule, _________ ions are pumped out of the tubule via ____________ transport. This creates an ____________ gradient, causing water to be reabsorbed through _______________.

In the proximal tubule, _________ ions are pumped out of the tubule via ____________ transport. This creates an ____________ gradient, causing water to be reabsorbed through _______________.

Predict what would happen if the tubule wall of the descending limb suddenly lost all its aquaporins.

Dr. Miller is a pediatric nutritionist working with a patient who has a low dietary calcium intake. Concerned about the possibility of hypocalcemia, she orders bloodwork. What hormone would you expect to be elevated in this patient’s bloodwork?

Ryan just ate a very protein-rich meal. Because of this, the amino acid levels in his blood currently exceed the transport maximum and the renal threshold for amino acids (65 mg/dL). What will happen to the excess amino acids?

In which section of the nephron is the process of reabsorption influenced by hormones?