Final answer:
The amount of oxygen bound to hemoglobin is influenced by the partial pressure of oxygen. As the partial pressure of oxygen increases, hemoglobin binds to oxygen more readily. Various factors such as temperature and pH can also affect the binding of oxygen to hemoglobin.
Step-by-step explanation:
The amount of oxygen bound to hemoglobin is a function of the partial pressure of oxygen (PO₂). As the partial pressure of oxygen increases, more oxygen molecules readily bind to hemoglobin. This relationship can be represented by the oxygen dissociation curve, which shows that as the partial pressure of oxygen increases, hemoglobin becomes increasingly saturated with oxygen. Other factors such as temperature, pH, the partial pressure of carbon dioxide, and the concentration of 2,3-bisphosphoglycerate can also affect the binding of oxygen to hemoglobin.