âIt wasnât a Tennessee orange,â Little said, âand it was not a pumpkin orange kind of thing either.â Texas used that color until the early 1960s, when Darrell Royal was in the midst of revamping the football program.
1 If the body is becoming fluid-deficient, this will be sensed by osmoreceptors, which results in increased secretion of ADH, causing fluid to be retained by the kidneys and urine output to be reduced.  The hormones ADH (Anti-diuretic Hormone, also known as vasopressin) and aldosterone play a major role in this.
Additionally, red blood cell production (which is normally driven by a substance produced in the kidneys) decreases. Low urine output also occurs when there is a decreased blood supply to the kidney, such as occurs with dehydration or excessive blood loss. Obstruction of outflow of the urine, either due to tumors, enlargement of the prostate, or bladder problems can also reduce urine output.