homeostasis

ネットで本を予約して図書館から借りるので、次の本を借りれるまでに空きができます。その時に読む手持ちの本 Understand Psychologyの第６章Motivationに今日覚えたい言葉 "homeostasis" の説明があります。
Psychologists investigating such physiological motives have found that these mechanisms are all concerned with getting the right balance in the body. As long as everything is at the right kind of level, we don't feel the motivation. But if something becomes imbalanced, for instance, if our blood sugar level gets too low or if we don't have a high enough level of fuid in the body, then we take action to put it right. This is known as maintaining homeostasis - maintaining the appropriate balance in the body so that we can function well, physically.
...
Physiological motives such as hunger and thirst serve to maintain homeostasis in the body.
"homeostasis" の意味は文中にありますし、以前 Biologyの本に出てきたことも思い出しました。今度は覚えられるかな。