Where are sensory receptors sensitive to changes in O2 levels in the bood located?

Answer 1

I don't think there is certain kind of O2 level sensory receptor. You know when your body suffer from lack of O2 through some symptoms, e.g. dizzy (your brain has high need of O2 to work well, if not it cannot work properly like your calculator works very slow when its batteries needs recharge), weakness (your muscles need O2 to work properly, especially for aerobic activities, such as long-range running), etc.

Answer 2

If I understand your question correctly the receptors are attached to your fingers or toes since extremities would be the first to show in drop in O2 levels first. As for an internal anatomical receptor I am not aware of any except for the changes in all cells which a generated due to O2 deprivation.

Answer 3

3 years ago, I was diagnosed - hypertension with a reading of 160/100. I used to feel dizzy a lot, my legs had awful cramps, and levels were very low in my potassium, causing my fingers and toes to always cramp together. One day I started to feel really faint while I was driving with my daughter in the back seat and I passed out, hitting 3 cars and ending up in a ditch. That moment,I knew I had to do something because my meds weren't working. I heard about this diet from a friend and thought I'd give it a shot. The results have been remarkable. In just 21 days, I honestly can't remember feeling this good, my blood pressure went from 175/110 to 125/70.