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
Q. Define Self Monitoring of Blood Glucose? Self Monitoring of Blood Glucose (SMBG): A patient can monitor the glucose level at home by self using the glucometer for checking t

How do carrier proteins transport substances across cell membranes? Carrier proteins bind to a molecule of the substance on single side of the membrane, change shape, transpor

What are some common laboratory techniques? During the course of these laboratory sessions, you will be usual to become proficient in the performance of the following laborator

Q. Clinical Features of aortic stenosis? Patients with congenital aortic stenosis usually present in childhood or adolescence. Those with rheumatic heart disease present durin

You are working with plants that have either hairy (dominant) or 'bald' (recessive) flowers. Hairy flowers have little hairs on them that make the flowers look fuzzy, bald flowers

Gastrulation in some Animals As mentioned before gastrulation marks the beginning of morphogenesis that is development of body form and organisation of cells in the embryo. By

Which of Mendel's postulates can only be demonstrated in crosses involving at least two pairs of traits? a) Segregation b) dominance/recessiveness c) independent assortment d) unit

Valves of the Heart There are four valves which are flap-like structures that function to maintain unidirectional (forward) blood flow through the heart chambers. These va

What is Flap tearing Poor preoperative surgical planning can result in flap of small size with inadequate exposure of the underlying bone. In an effort to increase the visibili

Consider a time when the membrane voltage of a SA node cell in the heart is at its minimum value (near -80 mv).  At this time, A. all the voltage-gated calcium channels will be