Difference between revisions of "Heart Endocrine Function - Anatomy & Physiology"

Revision as of 10:37, 3 July 2008

The Heart releases Natriuretic Peptides which act to lower blood pressure and thus work antagonistically to the Renin-Angiotensin-Aldosterone System.

*Natriuretic Peptides*
Hormone	Secreted From	!Action
Atrial Natriuretic Peptide	Atrial Myocytes	Released in response to triggers including atrial stretch, ANP increases sodium and thus water excretion at the kidneys, reducing blood volume and thus pressure. It also inhibits the Renin-Angiotensin Aldosterone System and relaxes arterioles. further reducing systemic blood pressure.
B-Type Natriuretic Peptide	Ventricles of the Heart	Decreases vascular resistance, in the same ways as ANP but is 10x LESS potent.

@@ Line 8: / Line 8: @@
 |+ ''Natriuretic Peptides''
 !Hormone
-!Site of Secretion within GIT
+!Secreted From
-!Action
+!!Action
 |-
-|<font color=Purple>Cholecystokinin</font>
+|<font color=Purple>Atrial Natriuretic Peptide</font>
-|Duodenum
+|Atrial Myocytes
-|Stimulates digestion of fat and protein by causing release of digestive enzymes and bile from the [[Pancreas - Anatomy & Physiology|pancreas]] and gall bladder.
+|Released in response to triggers including atrial stretch, ANP increases sodium and thus water excretion at the kidneys, reducing blood volume and thus pressure. It also inhibits the Renin-Angiotensin Aldosterone System and relaxes arterioles. further reducing systemic blood pressure.
 |-
-|<font color=Purple>Gastrin</font>
+|<font color=Purple>B-Type Natriuretic Peptide</font>
-|G-Cells in Stomach and duodenum
+|Ventricles of the Heart
-|Stimulates Parietal cells in the [[Forestomach - Anatomy & Physiology|stomach]] to secrete HCl and Chief cells to secrete pepsinogen.
+|Decreases vascular resistance, in the same ways as ANP but is 10x LESS potent.
 |}