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Erection - Anatomy & Physiology (view source)
Revision as of 10:47, 10 July 2008
, 10:47, 10 July 2008→Vascular and Biochemical Control of Erection
* Sinusoids are flattened because adrenergic nerves secrete noradrenaline (norepinephrine)that causes '''vasoconstriction'''.
* Sinusoids are flattened because adrenergic nerves secrete noradrenaline (norepinephrine)that causes '''vasoconstriction'''.
* Blood flow to cavernous tissue is low.
* Blood flow to cavernous tissue is low.
* No eretogenic stimuli present
* No erotogenic stimuli present
* Nonadrenergic noncholinergic (NANC) parasympathetic neurons do not fire.
* Nonadrenergic noncholinergic (NANC) parasympathetic neurons do not fire.
* No release of Nitric Oxide (NO)
* No release of Nitric Oxide (NO)
'''''Erect Penis'''''
'''''Erect Penis'''''
* Eretogenic stimuli present
* Erotogenic stimuli present
* NANC neurones fire and release NO from their terminals.
* NANC neurones fire and release NO from their terminals.
* NO activates the enzyme guanylate cyclase.
* NO activates the enzyme guanylate cyclase.