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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
Dialysis fluid contains all the constituents as in plasma except ______.
Put a tick mark (✓) against the most appropriate alternative in the following statement :
Besides water, the urine mainly contains :
Fill in the blank :
The unit of human kidney is called .....................
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.
Fill in the blank.
When air is humid, the rate of transpiration is ..................
One of the following sets of body parts or substances or processed, pick out the one item which overall includes the remaining foir.
ADH, Water, pituitary, osmoregulation, urine
Define the following term:
Ultrafiltration
Name the following:
Organ where ultrafiltration occurs.
Concentration of urine depends upon which part of the nephron
Identify the biological term
Produced when blood is filtered in a Bowman’s capsule.
Identify the biological term
Carry urine from the kidneys to the bladder.
During ultra:filtration, ____________ is unable to filter through the glomerular capillaries.
Proximal convoluted tubule differs from distal convoluted tubule being lined by ______
The correct path of transport of urine is ______
Filtration of the blood takes place at ______.
Sort the following into actively or passively transported substances during reabsorption of GFR.
glucose, amino acids, nitrogenous wastes, Na+, water
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?
Write full form of the following abbreviation:
DCT
