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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
Define the Glomerular Filtration Rate (GFR).
What is meant by the term osmoregulation?
Dialysis fluid contains all the constituents as in plasma except ______.
Explain the process of formation of urine with suitable diagram
Put a tick mark (✓) against the most appropriate alternative in the following statement :
Filtration of excretory wastes from the blood occurs in:
Define the following:
Nephron
Name the following:
Organ where ultrafiltration occurs.
Give the working of the nephron.
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 filtration occurs under pressure on the blood as a result of systolic pressure of the heart.
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?
Higher Order Thinking Skill
Why do you think that urine analysis is an important part of medical diagnosis?
What forces promote glomerular filtration? What forces opposes them? What is meant by net filtration pressure?
If the afferent arteriole of the nephron constricts, what happens to the GFR in that nephron? If the efferent arteriole constricts what happens to the GFR in that nephron? Assume that no auto regulation takes place.
Glomerular filtrate contains ______.
Identify the biological term
Each contains a glomerulus.
Identify the biological term
Regulation of water and dissolved substances in blood and tissue fluid.
Name the substances other than water, that are reabsorbed during urine formation. What are the two parameters that decide the amount of water that is reabsorbed in the kidney?
