- What is the difference between a countercurrent multiplier system?
- What is the principle of countercurrent exchange?
- How does countercurrent flow work?
- Is Vasa recta present in cortical nephron?
- Where is urine most concentrated?
- What is the function of the countercurrent multiplier?
- What is the countercurrent mechanism in the kidney?
- What is the effect of countercurrent multiplier in the loop of Henle quizlet?
- What is the Juxtamedullary nephron?
- Where does the countercurrent multiplier occur?
- How is urine concentrated and diluted?
- Why is Vasa recta absent in cortical nephron?
What is the difference between a countercurrent multiplier system?
Unlike the other countercurrent systems, a countercurrent multiplier system expends energy in active transport.
This expended energy distinguishes a countercurrent multiplier system from the other countercurrent systems.).
What is the principle of countercurrent exchange?
Countercurrent exchange is a mechanism occurring in nature and mimicked in industry and engineering, in which there is a crossover of some property, usually heat or some chemical, between two flowing bodies flowing in opposite directions to each other.
How does countercurrent flow work?
This is the way that a fish’s gills absorb the maximum amount of oxygen from the water. Water flows in the opposite direction to the blood flow in the gills to ensure that there is always a higher concentration of oxygen in the water than the concentration of oxygen in the blood.
Is Vasa recta present in cortical nephron?
The superficial cortical nephrons have peritubular capillaries which branch off the efferent arterioles, and provide nutrients to the epithelial cells which are present there. … The juxtamedullary nephrons have a special structure within the peritubular capillaries, called the vasa recta.
Where is urine most concentrated?
Maximum concentration occurs at the bottom of the loop. The ascending limb of the nephron loop is impermeable to water, but Na + and Cl – are pumped out into the surrounding fluids by active transport. As fluid travels up the ascending limb, it becomes less and less concentrated because Na + and Cl – are pumped out.
What is the function of the countercurrent multiplier?
Countercurrent multiplication in the kidneys is the process of using energy to generate an osmotic gradient that enables you to reabsorb water from the tubular fluid and produce concentrated urine.
What is the countercurrent mechanism in the kidney?
The counter-current multiplier or the countercurrent mechanism is used to concentrate urine in the kidneys by the nephrons of the human excretory system. The nephrons involved in the formation of concentrated urine extend all the way from the cortex of the kidney to the medulla and are accompanied by vasa recta.
What is the effect of countercurrent multiplier in the loop of Henle quizlet?
What is the effect of countercurrent multiplier in the nephron loop (loop of Henle)? Water is reabsorbed. Where does the reabsorption of ions occur in the nephron to produce a hyposmotic solution in the tubules? water loss only.
What is the Juxtamedullary nephron?
In other words, a juxtamedullary nephron is a nephron whose renal corpuscle is near the medulla, and whose proximal convoluted tubule and its associated loop of Henle occur deeper in the medulla than the other type of nephron, the cortical nephron.
Where does the countercurrent multiplier occur?
countercurrent multiplier system An active process occurring in the loops of Henle in the kidney, which is responsible for the production of concentrated urine in the collecting ducts of the nephrons.
How is urine concentrated and diluted?
When water intake is large enough to dilute blood plasma, a urine more dilute than blood plasma is produced; when water intake is so small that blood plasma is concentrated, a urine more concentrated than blood plasma is produced.
Why is Vasa recta absent in cortical nephron?
The proximity between the Henle’s loop and vasa recta, as well as the counter current in them help in maintaining an increasing osmolarity towards the inner medullary interstitium. This gradient is mainly caused by NaCl and urea. … This mechanism helps to maintain a concentration gradient in the medullary interstitium.