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प्रश्न
Explain the autoregulatory mechanism of GFR.
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
Glucose is taken back from glomerular filtrate ___________
(A) along with concentration gradient
(B) against concentration gradient
(C) by simple diffusion
(D) by tubular secretion
Draw neat and labelled diagrams of Malpighian capsule
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Name the following:
Organ where ultrafiltration occurs.
Differentiate between Afferent arteriole and Efferent arteriole.
Higher Order Thinking Skill
Why do you think that urine analysis is an important part of medical diagnosis?
Identify the biological term
Produced when blood is filtered in a Bowman’s capsule.
Identify the biological term
Removal of useful substances from glomerular filtrate.
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During ultra:filtration, ____________ is unable to filter through the glomerular capillaries.
Proximal convoluted tubule differs from distal convoluted tubule being lined by ______
The osmotic pressure of blood that opposes ultrafiltration is about ______ mm Hg.
Minimum reabsorption occurs in ______.
The pH of human urine is approximately ______.
The composition of glomerular filtrate and urine is not same. Comment.
How does tubular secretion help in maintaining ionic and acid-base balance in body fluids?
Name the following:
Three stages of urine formation.
