69. Intext question XXI

 

The amount of urine is regulated and controlled by kidneyspleen. It depends on the  quantity of excess water and wastes dissolved in waterquantity of excess gastric juices and quality of wastes dissolved in water.

 

Quantity of water: When there is excess water in the body tissues, small quantities of dilute urine is excreted outlarge quantities of dilute urine is excreted out. When less water is present in the body tissues, does not excrete concentrated urine concentrated urine is excreted.

 

Quantity of dissolved wastes: Dissolved wastes, especially nitrogenous wastes are excreted from the body. When there is more dissolved wastes, more quantity of water is needed less quantity of water is needed  to excrete them. Therefore, the amount of urine produced increases.