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Erection - Anatomy & Physiology
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Revision as of 10:25, 10 July 2008
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10:25, 10 July 2008
→Vascular and Biochemical Control of Erection
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* NO activates the enzyme guanylate cyclase.
* NO activates the enzyme guanylate cyclase.
* Guanylate cyclase converts guanylate triphosphate (GTP) into cyclic guanyosine monophosphate (cGMP).
* Guanylate cyclase converts guanylate triphosphate (GTP) into cyclic guanyosine monophosphate (cGMP).
−
* Causes
smoot
muscle of '''corporal sinusoids''' to relax (vasodilation).
+
* Causes
smooth
muscle of '''corporal sinusoids''' to relax (vasodilation).
* '''Cavernous sinusoids''' engorge with blood.
* '''Cavernous sinusoids''' engorge with blood.
* Intracorporal pressure increases dramatically.
* Intracorporal pressure increases dramatically.
* Pressure compresses the venules through which blood exits the penis.
* Pressure compresses the venules through which blood exits the penis.
* Blood trapped within the penis causing an erection.
* Blood trapped within the penis causing an erection.
+
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== Sensory Input and Local Vascular Response ==
== Sensory Input and Local Vascular Response ==
Lwilkie
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