The nervous system is the body's communication and control network. It receives and sends information, coordinates responses, and helps maintain stable internal conditions. Understanding its major divisions and functions provides a foundation for learning how body systems respond to signals and medications.
The nervous system consists of the central nervous system (CNS) and the peripheral nervous system (PNS). These divisions work together to process information and coordinate activity throughout the body.
All flashcards
What is the nervous system?
The body's communication and control system, coordinating activity through electrical and chemical signals.
What are the main components of the CNS?
The central nervous system consists of the brain and spinal cord.
What is the PNS, and how is it subdivided?
The peripheral nervous system consists of nerves extending from the spinal cord to the body. It is subdivided into the somatic and autonomic nervous systems.
What kinds of activities does the nervous system regulate?
It regulates thought, memory, speech, movement, sensation, and autonomic activities such as breathing, blood pressure, and digestion.
How does the nervous system support homeostasis?
It coordinates activity across the body, helping regulate internal functions and maintain a stable internal environment.
Quiz questions
What structures make up the central nervous system?Answer: The brain and spinal cord.
What is the peripheral nervous system primarily composed of?Answer: Nerves extending from the spinal cord to the body.
Which two subdivisions belong to the peripheral nervous system?Answer: The somatic and autonomic nervous systems.
What types of signals do nerve cells use to transmit information?Answer: Electrical and chemical signals.
How does nervous-system coordination help promote homeostasis?Answer: It helps regulate body functions and maintain a stable internal environment.
Based on Pharmacology for Nurses by Tina Barbour-Taylor, Leah Mueller (Sabato), Donna Paris, Dorie Weaver (OpenStax), licensed CC BY 4.0. Adapted into a summary, flashcards and quizzes.