Hey! Sign in to get help with your study questionsNew here? Join for free to post

Biology questions

Announcements Posted on
Four hours left to win £100 of Amazon vouchers!! Don't miss out! Take our short survey to enter 24-10-2016
    • Thread Starter

    This question has been giving me a headache

    Don't take my word for it but I would imagine that the carbon dioxide reacts with the water in tissues to form a weak carbonic acid which then dissociates into hydrogen carbonate ions and hydrogen ions

    Carbon dioxide + water --> H2CO3 (carbonic acid)

    Carbonic acid then disassociates into H+ ions and HCO3-.

    Most of the Carbon dioxide is transported in the cytoplasm of the red blood cells as hydrogencarbonate ions. In the body tissues, there is a high concentration of CO2 and Carbonic anhydrase to form carbonic acid. Which then disassociates.

    This correct. 93% of blood CO2 is in the form of HCO3- and a small amount is combined with Hb as carboxyhaemoglobin.
    The existence of HCO3- in the blood is very important as it functions as a buffer which stabilises blood pH.
    The thing about 2,3 DPG however is an allosteric effect which favours O2 unloading at lower pO2.
Write a reply…


Submit reply


Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. Oops, you need to agree to our Ts&Cs to register
  2. Slide to join now Processing…

Updated: April 10, 2016
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

What do you wear to bed?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.