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
What is meant by the term osmoregulation?
Dialysis fluid contains all the constituents as in plasma except ______.
Explain the process of formation of urine with suitable diagram
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.
When air is humid, the rate of transpiration is ..................
Write down the functional activity of the following parts,
Urethra ……………………
Give Reasons for the following:
As a result of ultrafiltration along with excretory products certain useful products like glucose, salt, etc. are also filtered but these are not excreted?
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.
Write the functional activity of the following structure: Bowman’s capsule
What is micturition?
What solute is normally present in the body to estimate GFR in humans?
Glomerular filtrate contains ______.
Identify the biological term
A ball of inter twined capillaries.
Na+ excretion in the urine is reduced by secretion of ______
The osmotic pressure of blood that opposes ultrafiltration is about ______ mm Hg.
Which part of the nephron allows the selective reabsorption of useful substances like glucose, amino acids, salts and water into the blood capillaries?
First step in urine formation is ______.
Write full form of the following abbreviation:
DCT
