Respiratory Lab Questions

1 a change in colour in the limewater indicates that there is more co2 in the limewater.
2 the control test tube is to show comparison to the testing test tub.
3 the change in colour of the universal indicator means the PH of the water has changed.
4 the purpose of the control beaker is to show comparison to the test beaker.
5 in the test beaker of water I blow bubbles in it so co2 can dissolve in it. Then the universal indicator turned the water a dark orange colour showing that the water is more acidic because of the co2.
6 the beaker is demonstrating what happens in my body because it show the acidic properties in co2 that is in my body that I have to get rid of. If I do not get rid of the co2 then my blood will get more acidic and I would then die.
7 My blood does not become acidic because the co2 returns to the lungs after the oxygen is used up and goes through the alveoli and out of my lungs and into the atmosphere. That way the co2 gets out of my body so my blood does not become acidic.
8 when the volunteers breathed through the paper bags their breathing rate rose because the oxygen was running out so the body started to breath faster in an attempt to get more oxygen into the body.