Which of the following BEST describes what happens to the amount of oxygen in the blood when blood comes into contact with a cell? A. It increases because the oxygen moves out of the cell into the blood. B. It decreases because the oxygen moves out of the blood into the cell. C. It increases because carbon dioxide is converted to oxygen in the blood. D. It decreases because the blood uses up all the oxygen before it gets to the cell.

the answer is D. It decreases because the blood uses up all the oxygen before it gets to the cell.

type 2 happens when excess consumption of high-sugar foods flood the blood supply with glucose and reduce the production and effectiveness of insulin. if a person has prediabetes, they can reduce the risk of full diabetes through regular exercise and a balanced, low-sugar diet.

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.