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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
Which of the following is the correct path taken by urine in our body?
Put a tick mark (✓) against the most appropriate alternative in the following statement :
Filtration of excretory wastes from the blood occurs in:
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bowman’s capsule and glomerulus.
Answer the following in detail.
Explain the structure of a nephron with the help of a diagram.
Explain the terms ultrafiltration and selective absorption
Differentiate between Afferent arteriole and Efferent arteriole.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Glomerular filtrate consists of many substances such as water, salts, glucose and white blood corpuscles.
Multiple Choice Question: Ultrafiltration occurs in:
In which segment of the nephron most of the re-absorption of substances takes place?
Identify the biological term
A liquid which gathers in the bladder.
Identify the biological term
Carry urine from the kidneys to the bladder.
Identify the biological term
Removal of useful substances from glomerular filtrate.
The human kidney is histologically divided into ____________.
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The osmotic pressure of blood that opposes ultrafiltration is about ______ mm Hg.
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Minimum reabsorption occurs in ______.
Complete the following:
Urinary excretion = Tubular reabsorption + Tubular secretion –
How does tubular secretion help in maintaining ionic and acid-base balance in body fluids?
