Scuba divers breathing air at increased pressure can suffer from oxygen toxicity—too much oxygen in the bloodstream—when the partial pressure of oxygen exceeds about 1.4 atm. What happens to the amount of oxygen in a diver's bloodstream when he or she breathes oxygen at elevated pressures? How can this be reversed?
Blood Pressure 1. Define blood pressure The pressure of circulating blood on the walls of blood vessels. It is usually expressed in terms of systolic pressure and diastolic pressure in the systemic circulation and measured in mmHg. 2. Describe its hemodynamics. Blood pressure is controlled by an integrated neuronal and hormonal control system that modulates: Blood volume The greater the volume, the higher the cardiac output. There is some relationship between dietary salt intake and increased blood volume, potentially increased in blood pressure. Cardiac output The pumping action of heart is ultimately responsible for blood