Now the entire Loop of Henley is found in our medulla. Now, the filtrate eventually travels up into this section known as the distal convoluted tubule. And just like the proximal, the distal convoluted tubule is down entirely inside Our Renal Cortex, as shown in this diagram. Now, the distal convoluted tubule is a portion of the nephron that reabsorbs some of the sodium as well as our calcium, while at the same time secreting potassium as well as the hydrogen ions into our filtrate. Now, in the presence of certain hormones, such as the antiduretic hormone ADH, this becomes permeable to water, and it reabsorbs the water from that filtrate back into our blood plasma. Finally we have this section known as the Collecting duct.