
Homeostasis refers to a system's ability
to regulate its internal ENVIRONMENT.
The Big Bang Theory Season 6, Episode 2

...Typhoid Penny
has introduced into our ENVIRONMENT.
The Big Bang Theory Season 1, Episode 11

You know, if this experiment is going to
be valid, I suggest a neutral ENVIRONMENT.
The Big Bang Theory Season 10, Episode 4

...you should know fanning yourself in a humid
ENVIRONMENT raises your body temperature.
The Big Bang Theory Season 8, Episode 6

...who is steady in the face of danger,
so I recommend an unsafe ENVIRONMENT.
The Big Bang Theory Season 6, Episode 18