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प्रश्न
How does tubular secretion help in maintaining ionic and acid-base balance in body fluids?
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उत्तर
During urine formation, the tubular cells secrete substances like H+, K+ and ammonia into the filtrate. Tubular secretion is also an important step in urine formation as it helps in the maintenance of the ionic and acid-base balance of body fluids.
- PCT helps to maintain the pH and ionic balance of the body fluids by selective secretion of hydrogen ions, ammonia and potassium ions into the filtrate
- DCT is also capable of selective secretion of hydrogen and potassium ions and NH3 to maintain the pH and sodium-potassium balance in the blood.
- The collecting duct also plays a role in the maintenance of pH and ionic balance of blood by the selective secretion of H+ and K+
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संबंधित प्रश्न
Put a tick mark (✓) against the most appropriate alternative in the following statement :
Besides water, the urine mainly contains :
Put a tick mark (✓) against the most appropriate alternative in the following statement :
Filtration of excretory wastes from the blood occurs in:
What is meant by osmoregulation?
Explain the terms ultrafiltration and selective absorption
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Glomerular filtration occurs under pressure on the blood as a result of systolic pressure of the heart.
Write the functional activity of the following structure: Bowman’s capsule
Choose the correct option.
Tubular secretion does not take place in ______.
What is micturition?
What forces promote glomerular filtration? What forces opposes them? What is meant by net filtration pressure?
When a molecule or ion is reabsorbed from the lumen of the nephron, where does it go? If a solute is filtered and not reabsorbed from the tubule, where does it go?
What solute is normally present in the body to estimate GFR in humans?
Aldosterone acts at the distal convoluted tubule and collecting duct resulting in the absorption of water through ______.
Identify the biological term
A ball of inter twined capillaries.
Identify the biological term
Each contains a glomerulus.
Identify the biological term
Regulation of water and dissolved substances in blood and tissue fluid.
What is the nitrogenous waste produced by amphibian larvae and by the adult animal?
Proximal convoluted tubule differs from distal convoluted tubule being lined by ______
Which part of the nephron allows the selective reabsorption of useful substances like glucose, amino acids, salts and water into the blood capillaries?
The pH of human urine is approximately ______.
What are the main processes of urine formation?
