DO YOU HAVE TO BREATHE LESS OFTEN lF YOU BREATHE 100% OXYGEN?
544375
In principle yes, but as in so much, principle doesn't govern this, much of the time. \n\nBreathing has two gross purposes. One is to intake ozygen, and the other is to exhale carbon dioxide. Air is about 20% oxygen, so the partial pressure of oxygen is about 1/5 atmosphere, or 1/5 x 30" of mercury or about 6" of mercury. Replacing air by pure oxygen at 6"Hg pressure, would be -- for the intake side -- not much of a change. Air ordinaryily has only a few percent partial pressure of CO2, so it would take much more than the existing and rising amount to interfere with exhaling metabolicly generated CO2.\n\nIncreasing the net oxygen pressure, to say 10"Hg pressure should increase intake efficiency and still greater partial  pressure should do more of the same. So one certainly wouldn't have to breath as much (or as fast) to get sufficient oxygen under such conditions. \n\nBut there are at least two problems with this. \n\nFirst, oxygen is rather reactive. At high enough pressures, it becomes poisonous. So there's a limit in that direction. \n\nAnd, second, for most people outside of the high mountains, the trigger for breathing is not insufficient oxygen, but the CO2 level in the blood. There is a sensor (in the throat) which tracks the CO2 level, and sends 'breathe now, breathe now, ...' signals to the brain when it goes above some value. There is an alternative sensor, tracking oxygen level, but it only comes into play at high altitudes and in any case it takes some time to make the changeover. \n\nCO2 levels are so important because dissovled CO2 ios not merely inert gas in solution. It is, in fact, a mild acid, and even small change in the acidity of body fluids can be fatal. Our biochemistry works best (and in some cases only works at all) when the pH (a measure of acidity) is within a very narrow range. It's very important to get rid of that CO2 promptly and effectively, lest you go into acidosis, which is very dangerous. \n\n======\nOxygen transport\n\nThere are two methods. The most dramatic is hemoglobin, a large molecule in red blood cells (turns them red, in fact), which changes shape slightly when it takes oxygen aborad and changes back when it releases it. Max Perutz and colleagues at Cambridge University took about a decade and a half to figure out the mechanism. And their research earned a Nobel Prize, too. This mechanism is somewhat insenstive to low partial pressures of oxygen.\n\nThe other mechanism is simply dissolving osygen molecules in blood fluid, and is driven by osmotic forces. More into the blood in paces with lots (ie, the lungs) and out in places where there is little oxygen around, as in the peripheral tissues perfused by capillaries. This method is entirely dependent on the partial pressure of oxygen in whatever mixture is being breathed.
411017
I breathe in for 8 seconds, hold for 8, breathe out for 8.  I do this 2 times and then go down to 6 seconds for 2 times... I continue this until I get to 2 seconds.  It helps get your diaphragm back in whack.  :)
899296
We don't breathe oxygen...we breathe a mixture of mostly nitrogen.\n\nThe air we breathe is made up of significant quantities of four gases:\n\n   1. Nitrogen (78%)\n   2. Oxygen (21%)\n   3. Argon (0.94%)\n   4. Carbon dioxide (0.04%) \n\nWhen we breathe in air, our bodies consume its oxygen and convert it to carbon dioxide. Exhaled air contains about 4.5-percent carbon dioxide. Our bodies do not do anything with nitrogen or argon.
884627
Yes you still have to breathe for them.  \nCPR is like artificial heartbeat and breathing.  \nIf you are interested, maybe you should take the certification class.
615658
Breathing each moment
455306
Oxygen, like a lot of substances our body needs, can be harmful in large quantities.  This is partly due to its highly electromagnetic and hydrophyllic nature.  As any patient that has been on oxygen therapy can tell you, your body is "set" to use a certain percentage of oxygen in the air we breathe.  If we get used to a higher amount, and then this amount is depreived, we feel light-headed and weak.  This is because at higher levels of oxygen, our lungs become accustomed to a smaller amount of effort to extract and use the oxygen from the air.  \n\nOxygen's corrosive nature is not found in the O2 form however, but the O and O3 (ozone) forms.  This is because oxygen is most stable in the O2 form.  This is where oxygen "wants" to be.  The O3 and O forms are unstable, and prone to reactions.    \n\n"Oxygen can be toxic at elevated partial pressures (i.e. high relative concentrations). This is important in some forms of scuba diving, such as with a rebreather.\n\nCertain derivatives of oxygen, such as ozone (O3), singlet oxygen, hydrogen peroxide, hydroxyl radicals and superoxide, are also highly toxic. The body has developed mechanisms to protect against these toxic compounds. For instance, the naturally-occurring glutathione can act as an antioxidant, as can bilirubin which is normally a breakdown product of hemoglobin. To protect against the destructive nature of peroxides, nearly every organism on earth has developed some form of the enzyme catalase, which very quickly disproportionates peroxide into water and dioxygen.\n\nHighly concentrated sources of oxygen promote rapid combustion and therefore are fire and explosion hazards in the presence of fuels. The fire that killed the Apollo 1 crew on a test launchpad spread so rapidly because the capsule was pressurized with pure oxygen as would be usual in an actual flight, but to maintain positive pressure in the capsule, this was at slightly more than atmospheric pressure instead of the 1/3 pressure that would be used in flight. (See partial pressure.) Similar hazards also apply to compounds of oxygen with a high oxidative potential, such as chlorates, perchlorates, and dichromates; they also can often cause chemical burns.\n\nOxygen derivatives are prone to form free radicals, especially in metabolic processes. Because they can cause severe damage to cells and their DNA, they form part of theories of carcinogenesis and aging." (Wikipedia 2006)\n\n"Oxygen is the most abundant element on this planet. The earth's crust is 46.6% oxygen by weight, the oceans are 86% oxygen by weight, and the atmosphere is 21% oxygen by volume. The name oxygen comes from the Greek stems oxys, "acid," and gennan, "to form or generate." Thus, oxygen literally means "acid former." This name was introduced by Lavoisier, who noticed that compounds rich in oxygen, such as SO2 and P4O10, dissolve in water to give acids.\n\n"Fluorine is the only element that is more electronegative than oxygen. As a result, oxygen gains electrons in virtually all its chemical reactions. Each O2 molecule must gain four electrons to satisfy the octets of the two oxygen atoms." ("Chemistry of Oxygen" - Bodner Research Group)
1045845
YES!  \nAbsolutely it does!\nYou are not taking in the proper amount of oxygen therefore not oxygenating your blood stream/muscles/lungs properly.
1176968
the higher up you go the "lower" the atmospheric presser is , means air is less dense more space between molecules so their is less oxygen available to breath
390741
Your depth of breathing and rate of breathing is adjusted by your body to keep your arterial blood oxygen saturation level about 95+% (this can be checked with a simple oximeter) and the arterial carbon dioxide at 40 mm Hg (this usually requires an arterial blood sample to check).
305180
your O2 saturation rate is the % of oxygenated blood running through your body. Normal is around 98% to 99%
958887
Lavender gave you the key information you need, i.e., too much oxygen damages the body. Probably the best-known example of this is blindness in prematurely born infants due to breathing pure oxygen for extended periods (which is sometimes necessary to keep them alive). There are probably medical techniques available today to minimize this problem, but it has been a serious issue in past years (20 years ago in one example I am familiar with).\n\nHere is a bit more information about breathing pure oxygen, and some clarification of the comments from others.\n\nYou can breathe pure oxygen for short periods in order to recover from lack of oxygen (athletes do it, as do firemen who have inhaled smoke, for example).\n\nThe air we breathe at sea level is at a pressure of 14.7 psi, and 21% of it is oxygen. (78% is nitrogen, and most of the other 1% is argon.) If you take 21% of 14.7psi, you'll see that we are breathing oxygen at a pressure of about 3 psi.\n\nPilots and astronauts can breathe pure oxygen, but as Lavender points out, they breathe oxygen at a pressure lower than sea level air pressure. If their oxygen is delivered to them at 3 psi, then it is equivalent to the oxygen in our air at sea level. (And incidentally, the air we breathe is not much changed at elevations up to 5,000 or 10,000 feet. As a rule of thumb, you can notice the difference in air pressure (the difference in the availability of oxygen) when you get close to 10,000 feet of elevation. At 18,000 feet, the air pressure is about 50% of that at sea level. And after another 18,000 feet, the pressure at 36,000 feet is cut in half again, so it is about 25% of the sea level pressure.)
704243
I think yes, it would lower PO2 at rest (and exercise too). This case  would be similar to pulmonary interstitial edema. This persons develop tachypnea which is consequence of low PO2, and little elevated PCO2. All of this is because of decreased diffusion through alveolar membrane.....I think...\n(imagine) If this change happened during evolution, there's no way to tell how high would PO2 be. It could be even higher due to other evolution changes, which could provide us more effective way of utilizing O2.
51504
if you breath you only get about 20% of the total amount of oxygen out of the air. The remaining oxygen you blow onto the coal which helps it to re-ignite for a sec.
992139
Everyone so far has excellent advice, every one works.  Try them all.  One extra thing I have found that helps me is deep breathing.   Science has shown there is 2% less oxygen in the air as there was 50 years ago.  So bodies slow down for survival.  Just type in "breathing exercises" in your browser text box and hit "GO".  It takes a while,  don't do it too violently or you will hyperventilate.    Good Luck with all the help.
678050
breathing rate depends on how quickly your muscles need the oxy , and heart rate depends on how much your muscles need the oxy.\nbreathing rate is normally on you. heart rate is how much oxy u need.
411888
Only using 25% in normal circumstances allows increased uptake from the same blood flow if required.  This further removal from the haemoglobin being easily achieved with little drop in PO2 as it is on the steep  part of the dissociation curve.  "An exercising muscle can extract virtually all the oxygen from its blood supply."\nAlso agree with above answer that otherwise, if you missed a single breath, blood with no oxygen would enter the arteries.
495760
I use breath control when I jog. Because we are two legged creatures, when we run, we have an extra moment though which to gather ourselves. You can literally breathe to your desire. \n\nIn yoga, breath control is crucial, inorder to circulate the blood to your muscles in certain stregnths. \n\nCo-ordinating your breath with thought, allows room for intelligent thought to be collected and understood!