Many fascinating facts are being uncovered about our sense of smell, or olfaction. COVID-19’s adverse effect on olfaction brought it popular and scientific attention. Learn about surprising things sense of smell reveals about your health:
Dec. 21, 2022 – In some relationships, women are the heart, the vision, and the brains. In our marriage, my wife is the nose.“Didn’t you notice it went bad?”“I had 'em for lunch 2 days ago!”Sure enough, in the basement, behind the couch, is a tiny dead mouse.
It's just one of many fascinating facts being uncovered about our sense of smell, or olfaction. COVID-19’s adverse effect on olfaction brought it popular and scientific attention. We saw a push to develop a quick, simple, and affordable test for smell loss. But smell remains crucial to our well-being. We’re learning more and more that our sense of smell is closely linked to our health – and could one day be used for monitoring our health and predicting disease.Consider what happens when we detect an odor – something we do thousands of times a day. For something to have a smell, it must give off molecules. We inhale these molecules into the tops of our noses, where 6 million to 10 million specialized receptor cells await.
Our sense of taste operates in a similar fashion, which is why people often confuse the two senses. Sensory cells in taste buds that line the tongue, back of the mouth, and palate detect chemicals in food molecules and relay that information to the brain. As we chew and swallow, some of these molecules are forced up through the nasal cavity to our old friends, the olfactory receptors, who contribute to the process.
The same receptors found in the nose have also turned up in the kidneys, heart, and lungs. Why that’s so isn’t clear, but Mainland believes it’s because these cells have multiple functions. For example, some appear in the “carotid body,” a small cluster of cells near the carotid artery in the neck, and “seem to be able to sense how much oxygen and carbon dioxide is present – basically measuring and responding to lactate as if it were an odor.
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