Question
In: Anatomy and Physiology
How does countercurrent multiplication maintain a concentration gradient that increases water reabsorption by the kidneys?
How does countercurrent multiplication maintain a concentration gradient that increases water reabsorption by the kidneys?
Solutions
Expert Solution
Answer
Loop of Henle is the part of the nephron that functions as a countercurrent multiplier.
There are two segments of the loop of Henle :
- Descending limb
- Ascending limb
- The ascending limb of the loop is
permeable to solutes but impermeable to
water.
- There is active reabsoption of NaCl at this site.
- As a result concentration of interstitial fluid increases.
- Descending limb of the loop is permeable
to water but impermeable to the solutes. As the
interstitial fluid is more concentrated, water flows into the
interstitium (reabsorption) at the descending limb.
- The filtrate gets more and more concentrated as it moves down to
the bending end of the loop.
- When concentrated filtrate moves upwards, in ascending limb, NaCl
follows their concentration gradient and leaves the tubule
lumen.
This is the countercurrent multiplication.
The repeated events of reabsorption of water and NaCl in the loop of Henle, works as a positive feedback mechansim that promotes water reabsorption by the kidneys.
Sydney Mullin answered 1 year agoRelated Solutions
Describe the regulation of water reabsorption in the kidneys.
Imagine you take a drug that increases the rate of Na reabsorption by your kidneys. All...
The process of countercurrent multiplication involves? Select one: a. Osmosis of water out of the ascending...
During countercurrent multiplication, water is reabsorbed into the blood from the descending limb of the loop...
Regarding countercurrent mechanisms: List which structure(s) is/are responsible for establishing the concentration gradient in the renal...
(Q.1-5) True(a) / False(b) 1. Aldosterone increases potassium absorption. 2. ADH reduces water reabsorption. 3. Kidneys...
How does the Loop of Henle create a concentration gradient in the mammalian kidney?
how does the loop of henle create a concentration gradient in the mammalian kidney?
How does osmolarity play a part in water reabsorption? What role does urea play in this...
what is the effect of high AVP concentration on water reabsorption in PT, CCD, TAL, tAL,...
- Large lots are desirable in supply chain coordination despite increasing holding costs.
- ***Convert the C++ to Python*** #include <iostream> using std::cout; using std::cin; using std::endl; int charClass; char...
- Make-or-Buy Decision Fremont Computer Company has been purchasing carrying cases for its portable computers at a...
- The following costs were incurred for the single product produced during the first year of operations...
- Non-constant growth model: Do=$2.00 required return on equity= 5% g= 9% n=1,2 g=7% n=3,4 g=3% n=5...
- . Find all x ∈ Z143 such that x2Ξ 7 (mod 143). Please explain all steps...
- #Python: A palindrome is a sequence of characters that reads the same backwards as forwards. For...