Advertisements
Advertisements
प्रश्न
What is tubular secretion? Name the substances secreted through the renal tubules.
Advertisements
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
Which of the following is the correct path taken by urine in our body?
Define the following:
Dialysis
Differentiate between Afferent arteriole and Efferent arteriole.
Multiple Choice Question: In the Bowman’s capsule:
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?
Mention any two vital functions of human kidney
When a molecule or ion is reabsorbed from the lumen of the nephron, where does it go? If a solute is filtered and not reabsorbed from the tubule, where does it go?
Which segment is the site of secretion and regulated reabsorption of ions and pH homeostasis?
What solute is normally present in the body to estimate GFR in humans?
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.
Concentration of urine depends upon which part of the nephron
The end product of Ornithine cycle is ______.
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?
During ultra:filtration, ____________ is unable to filter through the glomerular capillaries.
Proximal convoluted tubule differs from distal convoluted tubule being lined by ______
Filtration of the blood takes place at ______.
First step in urine formation is ______.
The composition of glomerular filtrate and urine is not same. Comment.
