This video confers the basic mechanism of acid-base regulation in the body. Briefly discussing the buffering system, it talks about the respiratory and renal compensation in maintaining a constant range of acid-base balance. Timeline: 00:26 Acid and Base 00:40 pH 01:26 Source of [H+] ions in the body 02:47 Defense against change in H+ concentration 04:26 buffering system 05:15 the respiratory compensation 07:03 the renal compensation 07:56 renal compensation in the PCT 09:37 renal compensation in the DCT and collecting tubule