Removing the parathyroid gland will cause an imbalance within hypothalamus.
A single carbon atom can form a maximum of 4 single covalent bonds... This is because it has 4 electrons and needs to reach a total of 8, so it can make up to 4 covalent bonds to gain the electrons it needs.
Your question doesn't make sense. Mitisis IS the process by which humans grow, thus increasing the number of cells in the body. Mitosis is a process that includes 4 phases. What exactly are you asking?