How the pH of blood can change? (1 Viewer)

[krissy7685]

Can anyone answer this question??

 

[Zarathustra]

yes.










The most common way would be by the formation of CO2, due to respiration - CO2(g) + H2O(l) <-> CO2(aq) + H2O(l) <-> H2CO3(aq) <-> H+(aq) + HCO3-(aq). As the hydrogen ion concentration increases the pH would go down. Any non-metal oxide will be acidic and any metal oxide will be basic.

btw - do you do chemistry (as this is covered fairly in depth there - its not in your profile but then neither is bio

EDIT: should do sub-scripts.... oh well

 

[xiao1985]

also i think anaerobic respiration can produce the waste product of some acid (forgot name)... that can lower the ph...

 

[Calculon]

Originally posted by xiao1985
also i think anaerobic respiration can produce the waste product of some acid (forgot name)... that can lower the ph...

lactic acid

 

[frodo]

i think you have to do a prac on the effect of CO2 on pH

 

[xiao1985]

Originally posted by frodo
i think you have to do a prac on the effect of CO2 on pH

yea not hard... univsersal indicator in tap water (better to use distilled water), then blow ur exhaled air into tube ^^ worked out nicely ^^

 

[untamedanimal]

We mixed hydrochloric acid with calcium pebbles. The gas formed is carbon dioxide and travels through that tube into distilled water. Then measure pH. We also did the blow into water one

 

[jesshika]

Originally posted by untamedanimal
We mixed hydrochloric acid with calcium pebbles. The gas formed is carbon dioxide and travels through that tube into distilled water. Then measure pH. We also did the blow into water one

ourclass did both to make sure taht it wasn't any other factor besides CO2 gas in our breathe that caused the ph levels of water to drop

 

[t-i-m-m-y]

Originally posted by untamedanimal
We mixed hydrochloric acid with calcium pebbles.

otherwise known as calcium carbonate

Co2 and lactic acid both affect pH. for biology, the main thing to know is thatwhen co2 dissolves in water, it lowers the pH

 

[CM_Tutor]

Remember also that there are a variety of buffers present in blood to ensure that its pH does not change very much.

 

[queenie]

Originally posted by CM_Tutor
Remember also that there are a variety of buffers present in blood to ensure that its pH does not change very much.

um yea.. homeostasis.. feedback mechanisms?

 

[xiao1985]

i think more like the heamoglobin... its capability to bind with CO2 increases with acidity or something...

 

[queenie]

wouldnt u breath faster to get rid of more Co2. anyway, as Co2 is the stimulus for respiration, and there's plenty of it in the body, you would naturally breathe more/faster

 

[untamedanimal]

Isnt breathing more faster a result of lack of oxygen rather than abundance of Co2?

 

[queenie]

well the stimulus of breathing is Co2...

lack of o2=2 much Co2

*shrugs, i thought breathing faster was the result of 2 much Co2, but some1 correct me on this....

 

[CM_Tutor]

Breathing rate / style does alter CO2 levels, and hence blood pH.

ie. respiratory acidosis (blood pH too low) can be caused by hypoventilation, and respiratory alkalosis (blood pH too high) can be caused by hyperventilation.

However, I was just pointing out that there are buffers in blood beyond the carbonic acid / hydrogencarbonate ion one, such as the hydrogenphosphate ion / dihydrogenphosphate ion buffer, which are involved in regulating blood pH.

 

[Gomer]

All you need to know is that CO2, a product of cellular respiration is the main agent in which causes a change in pH of mammalian blood.

CO2 when dissolved in water (i.e. blood plasma) will form carbonic acid and lower the pH.

-- Gomer