Benchmark 11C
Common Themes: Constancy and Change
Grades 6-8, page 274

Many systems contain feedback mechanisms that serve to keep changes within specified limits.

NSES Content Standard C 
Life Science: Regulation and behavior
Grades 5-8, page 157
Regulation of an organism's internal environment involves sensing the internal environment and changing physiological activities to keep conditions within the range required to survive.

See the general discussion in Unifying Concepts and Processes: Systems, order, and organization