Some fish are unable to meet their oxygen needs without swimming, which increases the flow of water over the gills. This is particularly true of large, fast-swimming fish such as tunas. The pigeon's hemoglobin will dissociate from some of its bound oxygen. Again look at the oxygen-hemoglobin dissociation curves shown above. Urine is formed in the vertebrate kidneys by ultrafiltration followed by active processes of resabsorption and secretion.
Human urine is filtered blood.
Urine is formed in the vertebrate kidneys exclusively by active transport of substances dissolved in the blood across the membranes of the nephron cells. Your blood levels of antidiuretic hormone will increase. Your blood levels of antidiuretic hormone will decrease. Your blood levels of antidiuretic hormone will probably stay the same as on a normal day. It is impossible to predict what will happen to your blood levels of antidiuretic hormone without knowing the pH of your blood 36.