Topic summary
What this topic is about
The review introduces the nervous system as the body's communication network. It distinguishes the central nervous system from the peripheral nervous system, then follows the peripheral system into voluntary and automatic functions. A reflex example shows a spinal response being coordinated quickly, while the brain processes the sensation.
Key ideas
- The central nervous system (CNS) consists of the brain and spinal cord.
- The peripheral nervous system (PNS) carries information between the CNS and the rest of the body.
- The somatic nervous system is linked to voluntary movement and sensory information.
- The autonomic nervous system regulates involuntary functions and includes sympathetic fight-or-flight and parasympathetic return-to-baseline activity.
Common confusion
The sympathetic and parasympathetic systems are both branches of the autonomic system; the video describes them as activating and calming functions, respectively.
Review connection
Review this in the Unit 1 Review video, then try the Topic 1.2 Practice Quiz.
Reviewed by Tim Steadman