GENERAL HISTOLOGY

Detailed explanation-1: -The cells of the kidney contain many specialized ion channels and transporters, which act in concert to regulate volume and ionic concentration by absorption or secretion of ions into the urine.

Detailed explanation-2: -Your kidneys remove wastes and extra fluid from your body. Your kidneys also remove acid that is produced by the cells of your body and maintain a healthy balance of water, salts, and minerals-such as sodium, calcium, phosphorus, and potassium-in your blood.

Detailed explanation-3: -1. differences in solute and water permability and reabsorption in different sections of the long loops of Henle and the collecting ducts. 2. The countercurrent flow of fluid through the tube-shaped structures in the renal medulla.