1. When we are overhydrated, what hormone are we releasing? -
ANS -aldosterone
2. Where does aldosterone come from? - ANS -adrenal cortex of the
adrenal gland
3. Aldosterone causes what 4 things - ANS -acts on the distal
tubules and collecting ducts of the kidney to
1. cause the conservation of sodium
2. secretion of potassium
3. increase water retention
, 4. increase blood pressure
4. What is the overall effect of aldosterone? - ANS -to increase
reabsorption of ions and water in the kidney
5. Bc we're peeing so much we're peeing out all the ADH and so
without ADH what happens? - ANS -water channels won't open
and therefore you won't pull back additional water
6. If we were so overhydrated we had no ADH... - ANS -- lower
osmolality of ECF
- dec. release of ADH from posterior pituitary
- decreased number of aquaporins in collecting ducts
- dec. h2O reabsorption from collecting ducts
- large volume of dilute urine
,7. The filtrate at the top of the ascending limb is - ANS -dilute (due
to salt removal)
8. In absence of ADH, collecting ducts ... - ANS -remain
impermeable to water and produce very dilute urine
9. Water moves out in the _________ limb while nacl move out in
the _____--- limb - ANS -descending; ascending
10. The filtrate osmolality of urine can decrease to ... - ANS -
100mOsm
, 11. When you're making a concentrated urine, ADH acts on the
collecting ducts to - ANS -increase the number of aquaporins
(h2O channels) in the collecting duct principal cells
(so i guess NaCl doesn't move out bc its in the collecting duct already
and NaCl can only move out within the ascending and descending
limbs)
- therefore more water can go out
12. If we were so dehydrated we had maximal ADH - ANS --
increased osmolality of ECF
- increased ADH release from from posterior pituitary
- increased number of aquaporins
- increased H2O reabsorption
- small volume of concentrated urine
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller DoctorKen. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.99. You're not tied to anything after your purchase.
