Respiration

• Describe how haemoglobin is adapted to maximise oxygen transport.

  4 polypeptide chains, each with iron rich haemoglobin group that can combine with oxygen. Conformational change makes it easier for the 3 other molecules to combine.
• What is partial pressure of oxygen?

  The proportion of total air pressure that is contributed to by oxygen.
• what is Tidal volume?

  the amount of air normally breathed in and out during breathing.
• what is vital capacity?

  the maximum amount of air that can be breathed out following a maximum inhalation.
• why do those with emphysema have a higher breathing rate?

  they have reduced gas exchange due to damage in alveoli.
• what is the difference between breathing and respiration?

  breathing is the process of taking air rich in oxygen and removing air in carbon dioxide to and from the lungs. Respiration is the process of breaking down glucose/ carbohydrates to release energy in body cells.
• What is basal metabolic rate?

  The minimum amount of activity needed for the body to tick over when completely at rest.
• name the part of the mitochondria in which the Krebs cycle takes place.

  matrix