A short transcript of a YouTube discussion explaining how nitric oxide (NO) affects blood flow and oxygen delivery. Speakers contrast two mechanisms: NO-mediated vasodilation improving circulation and the biochemical process of oxygen binding/release from hemoglobin (Bohr effect) within the cardiorespiratory cycle.
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How do we conceptualize. How does nitrous oxide involve in the blood flow? That's why I like to kind of separate. Is it part of absorbing the oxygen, or is it part of helping the blood vessel dilate?
Well, it's both, and I guess they're two completely different mechanisms. So in terms of improving blood flow and circulation, you know, our blood vessels are kind of compliant and vasoactive, meaning that when nitric oxide is produced, you can dilate the blood vessels. Then obviously, you get better blood flow and circulation. If you've got, you know, constricted blood vessels, then your blood pressure goes up, you lose the regulation of blood flow. So that's on the vascular control of things. But in terms of oxygen delivery, we know that for oxygen to come off hemoglobin, and this is a very complicated biochemical process called the Bohr effect. But when we breathe in oxygen, it binds to the iron of hemoglobin in our red blood cells. And then when that red blood cell goes from the arteries to the veins, it releases oxygen, picks up carbon dioxide, then we exhale the CO2, we pick up oxygen. This is the cardiorespiratory cycle.
