KEY CONCEPT The nervous system and the endocrine system provide the means by which organ systems communicate.
The body’s communication systems help maintain homeostasis. A stimulus is something that causes a change or response. Responses can be chemical, cellular, or behavioral. The nervous and endocrine systems respond to stimuli.
The nervous system controls thoughts, movement, and emotion. The endocrine system controls growth, development, and digestion.
interconnected network of tissues and cells signals move through cells The nervous and endocrine systems have different methods and rates of communication. The nervous system works quickly, using chemical and electrical signals. interconnected network of tissues and cells signals move through cells divided into central nervous system (CNS) and peripheral nervous system (PNS) spinal chord nerves
The endocrine system works more slowly. only chemical signals signals move through bloodstream physically unconnected organs target cell hormone bloodstream receptor not a target cell