A Patient Excretes a Large Volume of Very Dilute Urine

Question

A patient excretes a large volume of very dilute urine on a continuing basis. This is may be due to
A) excessive ADH secretion.
B) absence of ADH.
C) hematuric oliguria.
D) overproduction of aldosterone.
E) dilation of the afferent arterioles.

Accepted Answer

The production of large volumes of very dilute urine is a characteristic of diabetes insipidus, which results from the absence or decreased secretion of antidiuretic hormone (ADH) from the pituitary gland. ADH is responsible for regulating the reabsorption of water in the kidneys, and without it, excessive amounts of water are excreted in the urine.