Endocrine glands - kidney, Biology

Assignment Help:

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.


Related Discussions:- Endocrine glands - kidney

What is the hematopoiesis, Q. What is the hematopoiesis? Hematopoiesis ...

Q. What is the hematopoiesis? Hematopoiesis is the formation of blood cells with other constituent elements of the blood. Q. Where does hematopoiesis occur? Hematopoies

What are persistent organic pollutants, Q. What are persistent organic poll...

Q. What are persistent organic pollutants (POPs)? The POPs, or persistent organic pollutants, are toxic substances formed from organic compounds. The POPs are made in several i

Protozoa phylum, what is the main quality of this phylum

what is the main quality of this phylum

What fraction of the total number of possible, Assuming that all human prot...

Assuming that all human proteins are 300 amino acids long, what fraction of the total number of possible different proteins is found in the human body?

Precautions by dangers of working in labs with animals, The dangers of work...

The dangers of working in labs with animals will be minimised if the following precautions are taken: 1. Wash all dissection instruments in disinfectant after use. 2. Never

How can amine groups be classified, How can amine groups be classified? ...

How can amine groups be classified? Amines can be classify into primary amines, those to which one -R (variable radical) is attached to a -NH2, secondary amines, those where on

Microorganisms, methods of isolating and purifying two useful products from...

methods of isolating and purifying two useful products from microorganisms

Unit membrane model, structure explanation of unit membrane model

structure explanation of unit membrane model

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd