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

Define sterilization, Question 1 Write a short note on the following- ...

Question 1 Write a short note on the following- Fermenter Batch culture Viral pesticides Brewing   Question 2 Define sterilization. Discuss different ty

Define carbohydrate metabolism - ageing, Define Carbohydrate metabolism - A...

Define Carbohydrate metabolism - Ageing? Glucose tolerance may be impaired to some extent. Usually, the fasting blood sugar is normal. The absorption of carbohydrate is not im

Name the process in that substances carry across membrane, Substances which...

Substances which are insoluble in a membrane are carried across membrane with concentration gradient by means of a carrier molecule in a process termed as: a) Diffusion. b)

Calculate the molar concentration of illinic acid, Calculate the molar conc...

Calculate the molar concentration of illinic acid and of its conjugate base illinate ion (in moles/L; M) in a 0.002 M illinate buffer at pH 12.0. The pKa of illinic acid is 6.7. En

State the phases of soil genesis, State the phases of soil genesis Soil...

State the phases of soil genesis Soil genesis embodies two distinct phases. One is weathering that involves disintegration and decomposition of rocks and minerals, the other is

What is the adnexal organ of the digestive system, Q. What is the adnexal o...

Q. What is the adnexal organ of the digestive system in which bile is stored? How does this organ react to the ingestion of fat rich food? Bile is concentrated and stored in th

The main causes of the loss of biological diversity, What are the main caus...

What are the main causes of the loss of biological diversity nowadays? The biggest dangers to biological diversity today are the action of humans. The most of them is the destr

What is the basic morphology of a protozoan cell, What is the basic morphol...

What is the basic morphology of a protozoan cell? Protozoans are eukaryotic cells so they have organelles and structures common to this part of cell: endoplasmic reticula, Gol

Agro industrial-soaking, Soaking Soaking is an another inexpensive proc...

Soaking Soaking is an another inexpensive processing method, which does not require much technical know how, is commonly practiced for improving the palatability of chaffed cro

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