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.
Given the oxygen dissociation curve, relate hemoglobin saturation and Pa02. A further increase in the PO2 produces only a slight increase in oxygen-hemoglobin bonding. Explain the clinical significance of the flat and steep portions of the oxyhemoglobin dissociation curve.