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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
What is meant by the term osmoregulation?
Reabsorption of water from distal parts of the tubules is facilitated by hormone ______.
Dialysis fluid contains all the constituents as in plasma except ______.
Add a noteon composition of urine.
Draw neat and labelled diagrams of Malpighian capsule
Put a tick mark (✓) against the most appropriate alternative in the following statement :
Besides water, the urine mainly contains :
Fill in the blank :
The unit of human kidney is called .....................
Define the following:
Dialysis
Write True (T) or False (F) for the following statement. Rewrite the false statement in the correct form.
Medulla of kidney passes urine into urinary bladder.
Define the following term:
Ultrafiltration
Name the following:
Organ where ultrafiltration occurs.
Choose the correct option.
Tubular secretion does not take place in ______.
Mention any two vital functions of human kidney
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?
Concentration of urine depends upon which part of the nephron
Identify the biological term
Carry urine from the kidneys to the bladder.
Na+ excretion in the urine is reduced by secretion of ______
The composition of glomerular filtrate and urine is not same. Comment.
