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

Explain about crossing over, What is crossing over? How is meiosis related ...

What is crossing over? How is meiosis related to this phenomenon? Linked alleles, for instance, A-b and a-B, form the gametes A-b and a-B that maintain the linkage of the allel

Cyanmethaemoglobin standard - haemoglobin content in blood, Define Cyanmeth...

Define Cyanmethaemoglobin Standard - Haemoglobin Content in Blood? Certified standard haemoglobin solution may be obtained from certified or reputed laboratory supply firms. St

Lactation, LACTATION - Production of milk in the female's breasts af...

LACTATION - Production of milk in the female's breasts after delivery is lactation. Prolactin is responsible to synthesize milk in breast. Oxytocin is responsibleto gi

What mechanisms would na and water be secreted, When William was helping vi...

When William was helping victims following a devastating earthquake in a region that was not prepared to swiftly set up adequate temporary shelter, he developed severe diarrhea. He

What do you mean by tubular secretion, Q. What is tubular secretion? What a...

Q. What is tubular secretion? What are some examples of substances secreted through the renal tubules? Uric acid, Ammonia, potassium bicarbonate and hydrogen ions, bases and me

What is firing rate of carotid artery baroreceptors, What is firing rate of...

What is firing rate of carotid artery baroreceptors At 1:00 AM, person X's blood pressure is equal to the blood pressure set point.  At 1:01 AM, there is a decrease in the firi

Parturition , P ARTURITIO N - Gestation period is of 280 days (in rab...

P ARTURITIO N - Gestation period is of 280 days (in rabbit 28 days). Parturition is the expelling of fully mature young ones from the mother's uterus. Oxytocin stimulates

Spoilage of fish, Q. Spoilage of Fish and other Sea Foods Fish and other...

Q. Spoilage of Fish and other Sea Foods Fish and other marine foods are second only to meat and poultry as a staple animal food around the world. India is one of the important f

Plasma proteins - circulation, Plasma Proteins - Circulation The total...

Plasma Proteins - Circulation The total protein concentration of the plasma is around 7% only. The plasma proteins are of three types - serum albumin (4%), serum globulin (2.7

Define the sphingolipid metabolism - vitamin k, Define the Sphingolipid Met...

Define the Sphingolipid Metabolism - Vitamin K? Sphingolipids, as you would recall from your Biochemistry Course, are a class of membrane lipids that are composed of one molecu

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