Out in the open atmosphere, there is enough motion in the air to keep the oxygen and carbon dioxide mixed up. This motion of the air mostly comes from convection currents (i.e. wind) caused by temperature differences.
For homeostasis, insulin is the main hormone involved. Blood sugar regulation is the process by which the levels of blood sugar, primarily glucose, are maintained by the body.here are also several other causes for an increase in blood sugar levels. Among them are the 'stress' hormones such as epinephrine (also known as adrenaline), several of the steroids, infections, trauma, and of course, the ingestion of food.
Like insulin, glucagon is a protein hormone produced in the pancreas. It is a counterbalance to insulin. Approximately four to six hours after you eat, the glucose levels in your blood become reduced. This triggers the production of glucagon in the pancreas. When the pancreas secretes glucagon, it suppresses insulin. Glucagon signals the liver and muscles to break down glycogen into glucose and release glucose back into your bloodstream. This keeps your blood sugar levels from dipping too low.