twitter




Saturday, November 7, 2009

why the PH of blood must be according to conditions like acid and base?

it said that the blood Ph must vary according to condition and enviromental wheather and other factors.. why is it
Answer:
actually the normal pH of human blood is between 7.35-7.45 and it is regulated by the kidneys and lungs. For immediate control, you either hyperventilate to bring down your CO2 which will increase pH (make blood more alkaline), and likewise you will hypoventilate to decrease pH. Your kidneys will also excrete or retain acid or bicarb (base) depending on your blood pH, but this takes longer to occur compared to your respiratory compensation.Your body can function outside of those normal limits, but at the extremes your enzymes and proteins stop working because the severe alteration in pH will change their molecular configurations- very commonly we'll see people with profound acidosis experience cardiovascular collapse because their catecholamines won't bind to adrenergic receptors anymore, so they get profound hypotension and their heart stops beating.
Bloods pH is very tightly controlled between 7.0 and 7.4 by the body. Hemostasis is achieved by the conversion and removal of CO2 and Carbonic Acid and Hydrogen ions. If the blood pH varies out of these ranges you develop Metabolic Acidosis or Alkalosis. I do not know where you are getting your information.
I do not know where you are reading this, nor can I really understand your statement.Blood pH is highly regulated in the body because if it varies too much from 7.4 it denatures your proteins (if it becomes too basic it dissolves the proteins; if it becomes too acidic it coaggulates the proteins). Your blood contains chemicals called buffers which help to maintain the blood pH within normal limits. The enviornment and weather have nothing to do with it. Substances entering the blood stream from absorption of nutrients and drugs are what change blood pH.ANATOMY AND PHYSIOLOGY TEACHER
pH of the blood should always remain neutral around 7.

No comments:

Post a Comment

Note: Only a member of this blog may post a comment.

 
vc .net