| 1 | They discovered a pathway that inhibits nitric oxide and thus impedes blood flow. | |
| 2 | A steady stream of nerve impulses, which release nitric oxide into the penis and its blood vessels, maintain an erection. | |
| 3 | Endothelial cells manufacture a magical protective molecule of gas called nitric oxide, which protects our blood vessels. | |
| 4 | "Whenever nitric oxide levels are high -- from anything ranging from positive thought to exercise -- you're actually improving your resistance to disease, " she says. | |
| 5 | "Oxidative stress can also cause arteries to constrict by destroying nitric oxide, " Prof Griffith warned. |
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