Benchmark 6C
The Human Organism: Basic Functions
Grades 3-5, page 136

The brain gets signals from all parts of the body telling what is going on there. The brain also sends signals to parts of the body to influence what they do.

NSES Content Standard C
Life Science: The characteristics of organisms
Grades K-4, page 129
The behavior of individual organisms is influenced by internal cues (such as hunger) and by external cues (such as a change in the environment). Humans and other organisms have senses that help them detect internal and external cues.

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.