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: Erection Physiology 1
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Male: Erection Physiology
1. Nitric Oxide (NO) is the neurtransmitter that is released at the penis.
2. An erection is caused by increased blood flow into the penis.
3. Increased levels of Guanosine Monophosphate (cGMP) will lead to an erection.
4. NO is an enzyme that causes the breakdown of cGMP.
5. PhosphoDiEsterase type 5 (PDE-5) is an enzyme that causes the breakdown of cGMP.
6. Too much PDE - 5 may lead to erectile dysfunction.
7. Too little cGMP may lead to erectile dysfunction.
8. Viagra, and other ED drugs, typically work by inhibiting PDE - 5.
9. Viagra, and other ED drugs, typically work by promoting the synthesis of NO at the penis.
10. When a male takes viagra, they will automatically get an erection (even without sexual stimulation).
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Last modified on November 14, 2005