HN220 Chapter Notes - Chapter 19: Renal Medulla, Distal Convoluted Tubule, Renal Pelvis
Document Summary
What comes into the body and what is produced by the body must equal the sum of what is used by the body and what is eliminated from the body, as shown in the following equation: The kidneys play a key role in regulating fluid and electrolyte balance and acid-base balance. Solutes and water are returned to the plasma from the renal tubules by reabsorption. Ot all this material is reabsorbed, the transport of materials across the walls of the renal tubules amounts to a net loss of water and solutes by the body. These lost materials are excreted in the urine. Whe(cid:374) solutes a(cid:374)d (cid:449)ater e(cid:374)ter a(cid:374)d e(cid:454)it the plas(cid:373)a at the sa(cid:373)e rate, the plas(cid:373)a"s (cid:448)olu(cid:373)e a(cid:374)d composition do not change, and the body is said to be in balance. Two types of epithelial cells line these tubules: principal cells and intercalated cells.
