I don't really know if the human body can respond to the environment but definitely the human body reacts to the environment. For instance, if the weather was getting cold our bodies react to that temperature immediately. And if there was a volcano that erupted with hot lava everywhere our bodies react to flee and stay out of nature's way.
The human body respond to the brian
When the temperature gets low we get cold and the hair on our arms stand up and when it is hot out we sweat.