Twinkling Beam
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Effect of nicotine on blood circulation
a)it decreases blood pressure
b)it contracts atria
c)it mixes with blood
d)it decreases oxygen carrying capacity of lungs
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username3162332
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I'll help you but you have to figure out the answer

Nicotine does not decrease blood pressure but increases as it basically makes you breath harder due to the arteries getting "clogged up" so it's not answer a.
What do you mean by artia ? You meant arteries ??
The nicotine gets absorbed by the lungs and enteres blood vessels to the blood stream to then the brain .so does the nicotine actually mix with the blood or is it just carried ?
In terms of oxygen , carbon monoxide build up to about 4-8 %, the short effect of smoking is that your heart rate will increase making you breath more difficult as carbon monoxide build up fat in the arteries this condition is called
atherosclerosis affecting circulation
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macpatgh-Sheldon
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(Original post by Rxha)
I'll help you but you have to figure out the answer

Nicotine does not decrease blood pressure but increases as it basically makes you breath harder due to the arteries getting "clogged up" so it's not answer a.
What do you mean by artia ? You meant arteries ??
The nicotine gets absorbed by the lungs and enteres blood vessels to the blood stream to then the brain .so does the nicotine actually mix with the blood or is it just carried ?
In terms of oxygen , carbon monoxide build up to about 4-8 %, the short effect of smoking is that your heart rate will increase making you breath more difficult as carbon monoxide build up fat in the arteries this condition is called
atherosclerosis affecting circulation
Sorry to have to say this, but this answer is confused, and actually incorrect!

Firstly, the word (as correctly quoted by OP) is atria (NOT artia !!), which has nothing to do with arteries, but is the plural of the word atrium, which is one of the two (R & L) smaller chambers of the heart, from which blood flows into R & L ventricles, respectively, for the most part passively.

Secondly, the wild figure of 4-8% would result in the patient being dead - much lower concentrations are actually highly toxic.

Thirdly, "your heart rate will increase making you breath more difficult" makes no sense; there is no direct link between heart rate and dyspnoea (breathlessness).

Fourthly atherosclerosis is NOT "the build up of carbon monoxide" in the arteries.

The effect of nicotine is to stimulate the ganglionic receptors (known as nicotinic receptors, which are found on the second neurone (nerve cell) onto which the first neurone (called pre-ganglionic neurone = before the ganglion [ganglion is a lump in the nerve, which is wider than than the thinner nerve because it contains the cell bodies]). This can lead to changes in blood pressure in either direction - new smokers feel dizzy when they inhale the smoke, due to a drop in blood pressure, because the nicotine stimulates more parasympathetic ganglia than sympathetic ones [just remember (for A level) that sympathetic system increases blood pressure and heart rate, and parasympathetic reduces them].

BTW is this an MCQ that the OP is asking, or is it 4 Qs/explanations??
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username2769500
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Bloods ability to carry total oxygen is reduced as carbon monoxide has a higher affinity. More neurotransmitter is present as the form of nicotine, metabolism increases for several hours an increase in relaxation followed by an increased motivation and this cycle continues for every nicotine taken. Constricts your blood vessels over a long period and causes heart disease as blockages occur more easily and there's a lot more strain on the heart.
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