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प्रश्न
What is tubular secretion? Name the substances secreted through the renal tubules.
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उत्तर १
Tubular secretion is the transfer of materials from peritubular capillaries to the renal tubular lumen; it is the opposite process of absorption. This secretion is caused mainly by active transport and passive diffusion. Renal secretion is different from reabsorption because it deals with filtering and cleaning substances from the blood, rather than retaining them.
The substances that are secreted into the tubular fluid for removal from the body include:
- Potassium ions (K+)
- Hydrogen ions (H+)
- Ammonium ions (NH4+)
- Creatinine
- Urea.
उत्तर २
The movement of substances such as H+, K+, NH4+, creatinine and organic acids from the peritubular capillaries into the tubular fluid, the filtrate is called Tubular secretion.
संबंधित प्रश्न
Define the Glomerular Filtration Rate (GFR).
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Medulla of kidney passes urine into urinary bladder.
Where in the urinary system do the following processes take place?
- Urine formation: ______.
- Transport of urine away from kidney: ______.
- Temporary storage of urine: ______.
Fill in the blank.
........................ is found in the seeds of poppy plants.
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ADH, Water, pituitary, osmoregulation, urine
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Urethra ……………………
Name the following:
Organ where ultrafiltration occurs.
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Multiple Choice Question: In the Bowman’s capsule:
Choose the correct option.
Tubular secretion does not take place in ______.
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?
What forces promote glomerular filtration? What forces opposes them? What is meant by net filtration pressure?
What solute is normally present in the body to estimate GFR in humans?
Concentration of urine depends upon which part of the nephron
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Produced when blood is filtered in a Bowman’s capsule.
Identify the biological term
Each contains a glomerulus.
The correct path of transport of urine is ______
First step in urine formation is ______.
What are the main processes of urine formation?
How does tubular secretion help in maintaining ionic and acid-base balance in body fluids?
