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

Which are the major positive ions found in living beings, Q. Which are the ...

Q. Which are the major positive ions found in living beings? The major cations found in living beings are the calcium cation (Ca++), the potassium cation (K+), the sodium catio

Ecology, (i) On Figure, draw a ring around the number which indicates the e...

(i) On Figure, draw a ring around the number which indicates the energy entering the system via photosynthesis. (ii) The total energy available to the plants in the ecosystem

What is passive transport, What is Passive Transport? Passive Transpor...

What is Passive Transport? Passive Transport :  Specialized proteins called permeases also move specific substances across the cell membrane in a process called carrier transp

Defination of behaviour change communication, Q. Defination of Behaviour Ch...

Q. Defination of Behaviour Change Communication? Behaviour Change Communication (BCC) is an interactive process with communities to develop specific messages and methods using

Write the meaning of life style modification, Write the meaning of Life Sty...

Write the meaning of Life Style Modification (LSM) Life style modification means diet control and doing exercises. Diet control and exercise should be planned on individual bas

Explain cytoskeleton, What is cytoskeleton? What are its main constituents ...

What is cytoskeleton? What are its main constituents in animal cells? Ans) Cytoskeleton is the cytoplasmic structure that handles the cell, keeps its shape and fixates and moves

Mouse bioassay and mongoose bioassay, Question: (i) Which species of m...

Question: (i) Which species of microalgae are associated with ciguatera fish poisoning? (ii) Name five fish species generally implicated in ciguatera fish poisoning in Mau

What elements are present in a lipid, a) What are the two types of chemical...

a) What are the two types of chemical compound which combine to form a lipid? b) What elements are present in a lipid? a) Lipids are formed from the combination of

Briefly explain about archenteron and blastopore, Q. What are the archenter...

Q. What are the archenteron and the blastopore? What is the stage of the embryonic development in which these structures are formed? What are the destinations of the archenteron an

Respiration , why should breathe faster after a hard work

why should breathe faster after a hard work

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