Kidney

For discussing the functions of different structures of all organisms.

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raghda
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Kidney

Post by raghda » Tue Sep 11, 2007 11:38 pm

Hi !


If anyone know the role of the Kidney in regulation of arterial blood pressure ? Thanks in advance .

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MrMistery
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Post by MrMistery » Thu Sep 13, 2007 5:53 am

well the kidney regulates the volume of blood in the organism by eliminating more/less water. more water=> higher pressure. less water=> lower pressure
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

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Shajjn
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Post by Shajjn » Sun Oct 21, 2007 3:43 pm

Kidney is behind the renin-angiotensin system, which impact on blood pressure in the long-run.

Kidney release renin after drop in systemic blood pressure. Renin converts angiotensinogen to angiotension II which affect systemic arterioles to constrict, increasing the peripheral resistence, thus a increase of blood pressure back to normal.

mcar
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Post by mcar » Sat Nov 17, 2007 12:57 pm

Review the system. Relate the hormones.

ahm_k1
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Hello friends

Post by ahm_k1 » Fri Mar 21, 2008 2:02 pm

let me add sth. to your awsome comments : first the kidney mainatain arterial blood pressure in three mechanisms *neuronal like the sympathetic discharge through different mechanisms through an effect mainly on the afferent arteriole entering the glomerular capsule mainly *hormonal through many different hormones secreted from adrenal medulla and zona glomerulosa in the adrenal cortex and affect mainly efferent areriole and is accompanied by Na and K retension , Also ADH from supra optic and paraventricular nuclei in the hypotalamus *others like in human increasing thirst mechanisms and in other animal increase salt appetit
If u wanna more details in case u r in interest we can discuss this in details just ask .
:)

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MrMistery
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Post by MrMistery » Wed Mar 26, 2008 6:11 pm

ahm_k1, your contribution to the forum is appreciated, but please write whole words and avoid abbreviations as much as possible. Many of our users are not native English speakers.
Thank you.
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

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