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प्रश्न
Explain the autoregulatory mechanism of GFR.
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उत्तर
- The mechanism by which the kidney regulates the glomerular filtration rate is autoregulative. It is carried out by the juxtaglomerular apparatus.
- The juxtaglomerular apparatus is a microscopic structure located between the vascular pole of the renal corpuscle and the returning distal convoluted tubule of the same nephron.
- It plays a role in regulating the renal blood flow and glomerular filtration rate. When there is a fall in the glomerular filtration rate, it activates the juxtaglomerular cells to release renin.
- This stimulates the glomerular blood flow, thereby bringing the GFR back to normal. Renin brings the GFR back to normal by the activation of the renin-angiotensin mechanism.
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संबंधित प्रश्न
Define the Glomerular Filtration Rate (GFR).
What is meant by the term osmoregulation?
Add a noteon composition of urine.
Which of the following is the correct path taken by urine in our body?
Fill in the blank :
The unit of human kidney is called .....................
Answer the following question.
Effective filtration pressure was calculated to be 20 mmHg; where glomerular hydrostatic pressure was 70 mm of Hg. Which other pressure is affecting the filtration process? How much is it?
What is micturition?
Higher Order Thinking Skill
Why do you think that urine analysis is an important part of medical diagnosis?
In which segment of the nephron most of the re-absorption of substances takes place?
If Henle’s loop were absent from mammalian nephron, which one of the following is to be expected?
Identify the biological term
A ball of inter twined capillaries.
What is the nitrogenous waste produced by amphibian larvae and by the adult animal?
Na+ excretion in the urine is reduced by secretion of ______
Proximal convoluted tubule differs from distal convoluted tubule being lined by ______
The correct path of transport of urine is ______
Filtration of the blood takes place at ______.
The pH of human urine is approximately ______.
Sort the following into actively or passively transported substances during reabsorption of GFR.
glucose, amino acids, nitrogenous wastes, Na+, water
Name the following:
Three stages of urine formation.
