3 Answers. In Great Britain today, the role of the queen is completely ceremonial. She (and whoever comes after her as monarch) has absolutely no actual power. In political science terms, she is the head of state for Great Britain but is not head of government.
Overview. 1  Oxygen-hemoglobin dissociation curve sigmoidal shape is characteristic of positive cooperativity binding of 1 O2 molecule to 1 subunit of deoxyhemoglobin increases affinity for O2 in adjacent subunits. P50 is PO2 at which hemoglobin is 50% saturated â P50 â â hemoglobin affinity for O2 50% saturation achieved at higher-than-normal P50.
The component of the arterial blood gas used to evaluate this is the PaO 2. Remember that the normal blood PaO 2 value is 80-100 mm Hg. Oxyhemoglobin Dissociation Curve The oxyhemoglobin dissociation curve is a tool used to show the relationship between oxygen saturation and the PaO 2.