Chapter Chosen

Excretory Products and their Elimination

Book Chosen

Biology

Subject Chosen

Biology

Book Store

Download books and chapters from book store.
Currently only available for.
CBSE Gujarat Board Haryana Board

Previous Year Papers

Download the PDF Question Papers Free for off line practice and view the Solutions online.
Currently only available for.
Class 10 Class 12
Describe control of ADH on urine output.

Antidiuretic hormone (ADH) or vasopressin hormone : Urine output is inversely proportional to ADH. It is secreted by hypothalamus and released through posterior lobe of pituitary gland.

If there is excess of water in body then ADH is secreted in less amount so that urine output is increased and if there is less amount of water in the body then ADH is secreted more, because osmoreceptors in hypothalamus detect an increase in osmolarity of blood above a set point of 300 mosml–1, so that urine output is decreased. In this condition osmorecptor cells promote thirst. Drinking reduces osmolarity of blood. Those substances which increase urine output are called diuretics e.g. alcohol, tea, coffee and all type of non-alcoholic drinks etc. Control of ADH is a negative feed back circuit.

 

173 Views

What is Bowman's capsule?

The double walled cup like structure present at the starting of the renal tubule is Bowman's capsule. It encloses the glomerulus capsule. 
465 Views

What is the ultimate method for the correction of acute renal failure?

Kidney transplant.
687 Views

Name three uricotelic animals.

The uricotelic animals are
1. Birds
2. Reptiles
3. Insects

901 Views

 What is uremia ?

Uremia is the accumulation of urea in the blood due to the malfunctioning of the kidneys. The urea accumulation is harmful and may lead to kidney failure. 

568 Views

What is glomerulonephritis ?

Glomerulonephritis is the inflammation of glomeruli of the kidney. 
577 Views