Endocrine glands - kidney, Biology

KIDNEYS -

Origin. They develop from the mesoderm of the embryo.

The kidneys secrete three hormones: renin, erythropoetin and calcitriol.

(i) Renin. Whenever the rate of ultrafiltration falls, the cells of their juxtaglomerular complex secrete and release into blood a compound named renin.

It acts upon a plasma-protein, angiotensinogen, separating a compound, called angiotensin-II from it.

Angiotensin-ll accelerates heart beat and contract arterioles, thereby increasing blood pressure.

(ii) Erythropoietin. The oxygen shortage stimulates the kidney cells to secrete a hormone named erythropoietin into the blood. Erythropoietin stimulates the bone marrow to increase the production of RBCs.

(iii) Calcitriol. Vitamin D exists in two forms: calciferol or D and cholecalciferol or D .

Calcitriol is the active form of vitamin cholecalciferol (D ). It promotes absorption of Ca2+ and phosphorus in the small intestine and accelerates bone formation.

Posted Date: 10/2/2012 7:19:19 AM | Location : United States







Related Discussions:- Endocrine glands - kidney, Assignment Help, Ask Question on Endocrine glands - kidney, Get Answer, Expert's Help, Endocrine glands - kidney Discussions

Write discussion on Endocrine glands - kidney
Your posts are moderated
Related Questions
Trichomonas vaginalis - Protozoan This cosmopolitan protozoan lives exclusively in the female vagina and male urethra or prostate. It causes a mild disease called trichomonas

hints for preparing for college assignment any outline

Brain anatomical coordinate systems are the first potential point of confusion, as there are different ones due to the fact that research is conducted in different species where d

What are cilia and flagella? Cilia and flagella are structures found in prokaryotes as well in eukaryotic cells. They play defense, nutrition and movement roles for the cell. I

Explain about the Bioavailability of Minerals? Polyphenols can form complexes with metal cations through their carboxylic or hydroxylic groups, and thus interfere with the inte

Definition of a neuropsychological test The best definition of a neuropsychological test has been offered by Ralph Reitan, who described it as a test that is sensitive to the

What is Phylum Platyhelminthes - Flatworms ? This Class consists of the free-living flatworms, the best known of which is the Genus Planaria. Most of the species in this class

Briefly describe the principal lines of defence against bacteria entering the blood system. A blood clot forms a barrier to entry by bacteria. White cells ingest and kill bacte

Rheumatic heart disease was the predisposing cardiac lesion for IE in 20 to 25 per cent. In patients with rheumatic heart disease, endocarditis occurs most frequently on the mitral

Q What are the bacteriophages? Bacteriophages are viruses specialized in parasitism of bacteria. They are used in genetic engineering as molecular cloning vehicles to include r