Who or what is in control here, anyway? A terrible auto accident leaves a person bleeding beside the road. Blood loss is significant. The victim’s tissues are not getting enough oxygen. In the cells the mitochondria can’t produce enough ATP to sustain life. They compensate by switching to anaerobic respiration, which builds up lactic acid, resulting in a drop of blood pH. The low blood oxygen makes cells membranes leaky. Extracellular fluids enter cells. Major neural and chemical regulation centers seek to gain control of the situation. Breathing speeds up to rid the body of carbon dioxide in an attempt to raise blood pH. Pressure sensors in the carotid arteries respond to the low pressure, promoting the release of adrenaline and noradrenaline. Adrenaline speeds up the heart rate. Noradrenaline tightens down the blood vessels – measures the usually increase the blood pressure. Antidiuretic hormone levels in the blood get bumped up to enable the kidneys to retain water in the bloodstream and also to divert blood away from noncritical organs to maintain blood flowing to the heart, lungs, and brain. During this critical time, control is all-important. If the ambulance arrives soon enough, the victim may live.
As the victim lies there bleeding, waiting for help, the control mechanisms themselves will soon start to fail for lack of blood in the tissues. Sodium ions leak into cells while potassium ions leak out, just opposite of what they are supposed to do. The blood pH continues to drop, little sphincters at each capillary bed rose their grip so that blood stops moving through them, and fluid and protein start leaking, causing the blood to thicken further and reduce the flow through the capillaries. Because control mechanisms have now failed, the victim is near death. Is anybody or anything in control? What happening is called hypovolemic a shock, or simply shock. There comes a point of no return, when, even if an ambulance arrives, it is too late. Too much damage has already taken place.
Biological systems require delicate control systems. When those fail, death happens. Now, let us imagine the control systems required to keep the universe running smoothly. Fortunately, the Designer and creator of all the big systems is in control.