1. The number of each electron in this shell determines how an atom combines with other atoms to form compounds.
2. The number of electrons in an atom's outermost valence shell governs its bonding behavior.
C. a rise in blood carbon dioxide concentration
Explanation:
Negative feed back mechanism refers to the control mechanism in which a product of a particular pathway controls the switch on and switch off of that particular pathway.
Since breathing increases the blood oxygen concentration and lowers carbon dioxide concentration and pH. The sensors that regulate the breathing should respond to oxygen concentration as the carbon dioxide is the by-product of respiration and is responsible for increasing blood pH. Thus increased Carbon dioxide levels in blood is the only factor which will trigger breathing.
Stomach,that pretty much all I know
White blood cells help to fight off infection and then begins to repair the wound. This would take about 2-5 days to start healing
