Air intake and hypoxia when smoking a single cigarette; morning buzz from first cig?

Factual Questions
1

The literature on chronic hypoxia for long-term smokers is vast, and that’s not what I mean here. I believe hypoxia specifically refers to the ability of the blood and other organs to load oxygen, even though of course it is instigated by a lack of inspired oxygen. Please tell me if this is true.

For the sake of argument, consider a person with healthy lungs.

When you smoke a cig, your body goes through changes, of course, which you can feel. Is the amount of inspired air lower and that is one component, discounting nicotine, the chemical effects of combustion products?

The very fact of those combustion products taking up room in the inhalation stream, and the physics of oxygen expenditure in combustion I think account for it.

First time smokers–assuming coughing doesn’t override the experience–will get dizzy.

The first morning cigarette makes me, and many others, a little dizzy and gives a weird unsettled feeling. I know I’ve switched here to smokers–I don’t know if this phenomenon continues for heavy, long time users, those who may exhibit signs of what I think is chronic hypoxia.

I don’t like it, but I met a person who likes “getting high” from it. In high school I inhaled Whippets once or twice; forget the street term for this recreational “drug use,” but I think the high–basically nothing more than a kind of white-out-- is nothing more than oxygen starvation. I might be wrong, but that’s how I started thinking about this post.*
So,

  1. what is the O2 loss in a single cigarette drag?

  2. does that relate to the morning-smoke phenomenon?
    *But first by looking out the window this morning in my boxers contemplating the trees, nature’s magnificence, the buzz, and SD, in that order.

2

I think the buzz is from the nicotine, I get the same buzz from the electronic cigerettes. My mother smoked into her late 80’s and dies at 94. The doctor said a normal person would be unconcious from the amount of co2 in her blood but that her body had adjusted over the years from smoking. It finaly did kill her.