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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
Put a tick mark (✓) against the most appropriate alternative in the following statement :
Filtration of excretory wastes from the blood occurs in:
Fill in the blank :
The unit of human kidney is called .....................
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.
Answer the following in detail.
Explain the structure of a nephron with the help of a diagram.
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:
Multiple Choice Question: In the Bowman’s capsule:
The end product of Ornithine cycle is ______.
Identify the biological term
A liquid which gathers in the bladder.
Identfiy the biological term
Temporary storage of urine.
Identify the biological term
Each contains a glomerulus.
Identify the biological term
Removal of useful substances from glomerular filtrate.
Identify the biological term
What solute the blood contains that are not present in the glomerular filtrate?
With regards to toxicity and the need for dilution in water, how different are ureotelic and uricotelic excretions? Give examples of animals that use these types of excretion?
How is urea formed in the human body?
The osmotic pressure of blood that opposes ultrafiltration is about ______ mm Hg.
Complete the following:
Urinary excretion = Tubular reabsorption + Tubular secretion –
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?
