Question

Identify a hormone that acts at the DCT & describe the general function of this hormone when it arrives at the DCT.

Answer 1

Anti diuretic hormone is the hormone which acts on the distal convoluted tubule and on collecting duct aswell.

ADH also called as vasopressin, it acts on the vasopressin type 2 receptors present on basolateral membrane of these tubules.

When it arrives at the DCT, it specifically causes the reabsorption of sodium. This will lead to reabsorption of water aswell, causing retension of water in the body.

In the absence of this hormone, DCT is practically impermeable to water and it eliminates it in the form of urine.

Another hormone is aldosterone, which also acts on the distal convoluted tubule leading to the sodium reabsorption and potassium excretion. This aswell leads to water conservation in the body.