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प्रश्न
What is tubular secretion? Name the substances secreted through the renal tubules.
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
Reabsorption of water from distal parts of the tubules is facilitated by hormone ______.
Glucose is taken back from glomerular filtrate ___________
(A) along with concentration gradient
(B) against concentration gradient
(C) by simple diffusion
(D) by tubular secretion
Explain the process of formation of urine with suitable diagram
Put a tick mark (✓) against the most appropriate alternative in the following statement :
Besides water, the urine mainly contains :
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.
Name the following:
Organ where ultrafiltration occurs.
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.
Multiple Choice Question: Ultrafiltration occurs in:
Concentration of urine depends upon which part of the nephron
If Henle’s loop were absent from mammalian nephron, which one of the following is to be expected?
Identify the biological term
Produced when blood is filtered in a Bowman’s capsule.
Identify the biological term
Removal of useful substances from glomerular filtrate.
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 ______
Filtration of the blood takes place at ______.
Minimum reabsorption occurs in ______.
The following substances are the excretory products in animals. Choose the least toxic form among them?
How does tubular secretion help in maintaining ionic and acid-base balance in body fluids?
