where does ADH and aldosterone act (1 Viewer)

[homijoe]

just want to clear up where these two hormones act...becoz different text books say different things so im kinda confused..is it safe to say ADH acts in the collecting duct AND distal tubule or just collecting duct...and does aldosterone act throughout the nephron except the collecting duct?

 

[axlenatore]

The Anti Diuretic Hormone (ADH) is a protein secreted by the pituitary gland, which conserves body water by reducing the output of water in urine; it does this by promoting the reabsorbtion of water back into the bloodstream from the second convoluted tubule and collection ducts by altering the permability of these tubles, resulting in more water moving back into the blood steam. Osmoreceptors in the brain detects a change in the osmotic concentration of the blood and send or stops sending ADH to act appropriately to restore normal water levels by adjusting the amount of water reabsorbed.
Aldosterone is a hormone that helps maintain the Sodium and Potassium ion balance in the blood. The concentration of these ions is proportional to the volume of the blood, when there is low concentration of these ions, the blood volume is low, and when these ions are in a high concentration, the blood volume is high. This is because the amount of ions alters the concentration gradient, if receptors detect that the blood volume is low they will promote the sending of Aldosterone to absorb more of these ions through the collecting ducts, thus changing to concentration gradient promoting the reabsorbtion of water increasing blood volume.

Thats wha ive got

 

[syriangabsta]

The Anti Diuretic Hormone (ADH) is a protein secreted by the pituitary gland, which conserves body water by reducing the output of water in urine; it does this by promoting the reabsorbtion of water back into the bloodstream from the second convoluted tubule and collection ducts, resulting in water. Osmoreceptors in the brain detects a change in the osmotic concentration of the blood and send or stops sending ADH to act appropriately to restore normal water levels by adjusting the amount of water reabsorbed.
Aldosterone is a hormone that helps maintain the Sodium and Potassium ion balance in the blood. The concentration of these ions is proportional to the volume of the blood, when there is low concentration of these ions, the blood volume is low, and when these ions are in a high concentration, the blood volume is high. This is because the amount of ions alters the concentration gradient, if receptors detect that the blood volume is low they will promote the sending of Aldosterone to absorb more of these ions through the collecting ducts, thus changing to concentration gradient promoting the reabsorbtion of water increasing blood volume.

Thats whay ive got

@__@ crazy

 

[Ali92l]

just want to clear up where these two hormones act...becoz different text books say different things so im kinda confused..is it safe to say ADH acts in the collecting duct AND distal tubule or just collecting duct...and does aldosterone act throughout the nephron except the collecting duct?

ADH acts in distal tubule and collecting ducts
Aldosterone acts in the ascending limb, distal tubule and collecting ducts

 

[danz90]

My bio teacher taught us that ADH acts in the proximal tubule and collecting ducts, and Aldosterone in the distal tubule....
ughhh confusions.
will call the advice line once its open to clarify all this.

 

[dolbinau]

Ahmad Shah Idil's notes in the resources section say ADH: Collecting Ducts and Distal Tubule; He isn't specific with Aldosterone though.

Is it really necessary to be so specific?

 

[axlenatore]

The Anti Diuretic Hormone (ADH) is a protein secreted by the pituitary gland, which conserves body water by reducing the output of water in urine; it does this by promoting the reabsorbtion of water back into the bloodstream from the second convoluted tubule and collection ducts by altering the permability of these tubles, resulting in more water moving back into the blood steam. Osmoreceptors in the brain detects a change in the osmotic concentration of the blood and send or stops sending ADH to act appropriately to restore normal water levels by adjusting the amount of water reabsorbed.
Aldosterone is a hormone that helps maintain the Sodium and Potassium ion balance in the blood. The concentration of these ions is proportional to the volume of the blood, when there is low concentration of these ions, the blood volume is low, and when these ions are in a high concentration, the blood volume is high. This is because the amount of ions alters the concentration gradient, if receptors detect that the blood volume is low they will promote the sending of Aldosterone to absorb more of these ions through the collecting ducts, thus changing to concentration gradient promoting the reabsorbtion of water increasing blood volume.

Thats what ive got

This is from my notes which ive made from various text books, hsc online and information from my teacher

Im pretty sure if they ask a quesiton on ADH and aldosterone or even horomone replacement thearpy (addisons disease) they would like you to mention where this take place, and im more depth than just nephrons as that could infer that this occurs in the bowmans capsule etc, but from what ive read, and the general idea from this thread even seems to agree collection ducts are one place, whilst there are different versions for the tubule, but im pretty sure they are all the same, ive said second convoluted tubule, but im pretty sure is just the section between the loop of henle and the collection duct, and im pretty sure it can be broken down into "smaller section" such as the promital tubule which someone suggested