DNA has a negative charge because of the phosphate ions in its chemical backbone.
Homeostatic regulation involves three parts or mechanisms: 1) the receptor, 2) the control center and 3) the effector. The receptor receives information that something in the environment is changing. The control center or integration center receives and processes information from the receptor.
This is because it takes time for protein synthesis to commence, the hormone to diffuse into the blood-steam, and for it to circulate around the body and take effect. Temperature Homeostasis (thermoregulation) One of the most important examples of homeostasis is the regulation of body temperature.