Homeostasis
An automatic response to the environment is a reflex
The cerebellum in the brain.
thyroid gland .
Sweating and thirst
The skin,
protectors
astrocytes
Yes, that type of hormone is called an endocrine hormone.
The nervous system is responsible for determining the body's immediate response to the heat. It also is responsible for determining the body's immediate response to the cold.
kydneys
the stoma
Nothing