NYPD cop who sifted through ten tons of 9/11 debris says he saw a ghost 'trying to help' while searching for clues to identify victims from attacks at landfill, book reveals. 1  Sgt. Frank Marra, 48, said he saw ghost of African American woman, who was dressed in white as a Red Cross worker from Second World War.
oxygen debt. a state that arises in very active muscles when insufficient oxygen is supplied by the lungs, causing the muscle tissue to respire anaerobically with the production of LACTIC ACID. When muscular activities slow down, the rate and depth of breathing remains at a high level until the lactic acid has been oxidized.
Therefore, one molecule of hemoglobin can bind four molecules of oxygen. As each red blood cell contains about 280 million hemoglobin molecules, a single red blood cell can carry over 1 billion molecules of oxygen. Once again, that's a lot of oxygen! Cooperative Binding. Okay, so hemoglobin carries oxygen, but how does oxygen bind to hemoglobin? The way by which hemoglobin binds oxygen is referred to as cooperative binding. The binding of oxygen to hemoglobin makes it easier for more oxygen to bind. Let's consider an analogy.