Gas transport in the blood is facilitated by several specialized cells, proteins, and ions within the circulatory system. Three of these components are listed in the table below.
Place ticks (✓\checkmark✓) in the correct boxes to indicate which properties and features are true for each component.
| Component | Contains a metal ion (such as iron or zinc) essential for its structure or function | Is a protein or a protein-containing complex | Enters the erythrocyte via an exchange protein to maintain electrical neutrality (chloride shift) | Has an affinity for oxygen that is reduced by high concentrations of hydrogen ions (Bohr effect) |
|---|---|---|---|---|
| Oxyhaemoglobin | ||||
| Carbonic anhydrase | ||||
| Chloride ion |
