Bio question

[mermaid66]

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hi 🙂
the bohr effect in bio really confuses me I cant get the graphs and PO2 stuff. can anyone help me and by the was I came a cross this problem in MCAT BIO Barron's
in hyperventilation
a) ph increase
b)ph decrease
c) ph remain the same
d) oh stays at 7
the answer is a
but I thought that in hyperventilation you breath faster, so more O2 will release at your tissues and therefore the concentration of [H+] will increase and be more aciudic ? :O
does anyone know? am i Too off??????????

 

[Sublimation]

hi 🙂
the bohr effect in bio really confuses me I cant get the graphs and PO2 stuff. can anyone help me and by the was I came a cross this problem in MCAT BIO Barron's
in hyperventilation
a) ph increase
b)ph decrease
c) ph remain the same
d) oh stays at 7
the answer is a
but I thought that in hyperventilation you breath faster, so more O2 will release at your tissues and therefore the concentration of [H+] will increase and be more aciudic ? :O
does anyone know? am i Too off??????????

You dont hyperventilate because u lack oxygen. The more O2 in the body doesnt mean that your body will be diffusing all of it into the surrounding tissue. Wat happens is that you will have an increase in blood O2 Levels and decrease in blood CO2 level making it more basic. less acid. When you are doing something that is in need of a great deal of oxygen u release more CO2 which will lower pH and thus stimulate deeper and faster breathing.

 

[Sublimation]

Stress or anxiety commonly are causes of hyperventilation; this is known as hyperventilation syndrome. Hyperventilation can also be brought about voluntarily, by taking many deep breaths. Hyperventilation can also occur as a consequence of various lung diseases, head injury, or stroke (central neurogenic hyperventilation, apneustic respirations, ataxic respiration, Cheyne-Stokes respirations or Biot's respiration). Lastly, in the case of metabolic acidosis, the body uses hyperventilation as a compensatory mechanism to decrease acidity of the blood. In the setting of Diabetic Ketoacidosis, this is known as Kussmaul breathing - characterized by long, deep breaths.
Hyperventilation can also occur when someone exercises over his/her VO2 max, when she/he can't transform oxygen in energy beyond a certain level but hyperventilate in effort to do so.
Hyperventilation is not the same as hyperpnoea. In hyperpnoea, increased ventilation is appropriate for a metabolic acidotic state, this is also known as respiratory compensation. Whereas in hyperventilation, increased ventilation is inappropriate for the metabolic state of blood plasma.



Wiki.

 

[nze82]

Hyperventilation = Lack of oxygen and excess of CO2.
As CO2 concentration increases, blood acidity increases. In other words pH drops. Drop in pH is an indication of the fact that the body is in need of oxygen. This drop in pH is detected via chemoreceptors in arteries. The proper signal is then sent to the brain stem (Medulla), and the medulla will in turn increase the breathing rate to restore the proper O2 concentration.

 

[timwatley]

hi 🙂
the bohr effect in bio really confuses me I cant get the graphs and PO2 stuff. can anyone help me and by the was I came a cross this problem in MCAT BIO Barron's
in hyperventilation
a) ph increase
b)ph decrease
c) ph remain the same
d) oh stays at 7
the answer is a
but I thought that in hyperventilation you breath faster, so more O2 will release at your tissues and therefore the concentration of [H+] will increase and be more aciudic ? :O
does anyone know? am i Too off??????????

As CO2 builds up in your body, so does H+. More H+ means a lower pH. This is generally felt as the "soreness" when you're..doing push ups or something and have to stop. Your muscles are working too hard and you can't supply enough oxygen, which in turn means that CO2 stays in the blood, along with this high H+ (low ph). This is especially bad for the brain because the brain is really sensitive. Hyperventilation is a way to quickly RAISE the pH to safer, more alkaline levels. By increasing the breathing rate rapidly you are supplying excessive amounts of oxygen to the body tissues that need it. Increased oxygen amounts quickly catch up to the amount of CO2 that is being produced and your body is now relatively balanced because it has the required amount of oxygen needed to supply ATP to the muscles that need it.

 

[dentalaee]

The key word here is "in" hyperventilation.

Hyperventilation happens in response to low oxygen, low pH (high H+), and high CO2.

Therefore, "in" hyperventilation, it will revert that.

 

[Sublimation]

Counterintuitively, such side effects are not precipitated by the sufferer's lack of oxygen or air. Rather, the hyperventilation itself reduces the carbon dioxide concentration of the blood to below its normal level, thereby raising the blood's pH value (making it more alkaline), initiating constriction of the blood vessels which supply the brain, and preventing the transport of certain electrolytes necessary for the function of the nervous system.[1]


During hyperventilation, you do not really lack oxygen. Read wat i posted earlier. its not due to lack of CO2. U dont hyperventilate when u work out. if your breathing too fast or too often ur diffusing more CO2 out of the blood though ur lungs then ur body can generate by metabolic processes THUS increasing ur blood pH.

Thats why tell u to breath through a bag. So ur letting more CO2 into ur blood.

 

[rocuronium]

Hyperventilation is not the same thing as tachypnea.

Hyperventilation refers to a state where alveolar minute ventilation is in excess of that needed to maintain normal acid base balance. Simply, it means that you are blowing off more carbon dioxide than normal. Tachynpnea, on the other hand, is simply an increased respiratory rate, and is usually an appropriate response in order to meet the required minute volume.

Therefore, someone who is physically exerting themselves is likely tachypneic, but not hyperventilating. Their respiratory rate would be increased, as would their alveolar minute volume, but it is appropriate for the situation because their carbon dioxide production is increased.

You do not have to breathe fast to hyperventilate. It is definitely possible to hyperventilate with a slow respiratory rate if you take sufficiently large breaths.

Another important point is that your breathing rate and depth are usually controlled by carbon dioxide levels and not oxygen levels. In healthy people, taking larger and faster breaths than normal will not appreciably change blood oxygen content. For example, some people claim that hyperventilating before diving will increase their blood oxygen content, allowing them to stay underwater for longer. In reality, the hyperventilation decreases their blood carbon dioxide content, and therefore decreases the stimulus to breathe. This is obviously dangerous, as the oxygen levels in the blood have not changed.

So to answer the original question, hyperventilation will definitely increase the blood pH. The hyperventilation results in less carbon dioxide in the blood, and therefore a lower acidity.

 

[tdkyun]

As CO2 builds up in your body, so does H+. More H+ means a lower pH. This is generally felt as the "soreness" when you're..doing push ups or something and have to stop. Your muscles are working too hard and you can't supply enough oxygen, which in turn means that CO2 stays in the blood, along with this high H+ (low ph)

muscle soreness isn't due to lactic acid build up =/

 

[Sublimation]

muscle soreness isn't due to lactic acid build up =/

The burn u feel is do to lactic acid build up. Now that lactic acid build up is paid off an hour or so after ur workout. Now soreness, is not due to Co2 build up. U feel sore a day or 2 after u work out right? so ur body compensates for the lack of O2 and the build up of CO2 right after a workout. DOMS (delayed onset muscle soreness is due to the breakdown of muscle fibers) NOT CO2 build up.