The Nervous System

Questions and Answers

Which of the following is part of the Central Nervous System (CNS)?

Efferent nerves

Brain (correct)

Afferent nerves

Spinal cord (correct)

The Peripheral Nervous System (PNS) has only one division.

False

What are the two subdivisions of the Autonomic Nervous System?

Sympathetic and Parasympathetic

The _____ nervous system consists of the brain and spinal cord.

<p>Central</p> Signup and view all the answers

Match the following divisions of the Peripheral Nervous System with their functions:

<p>Somatic = Innervates voluntary skeletal muscle under conscious control Autonomic = Innervates cardiac and smooth muscle in internal organs</p> Signup and view all the answers

Study Notes

Nervous System Overview

The nervous system is essential for processing information and responding to stimuli.
Divided into two primary divisions: Central Nervous System (CNS) and Peripheral Nervous System (PNS).

Central Nervous System (CNS)

Comprised of the brain and spinal cord.
Receives sensory information through afferent nerves.
Initiates responses and actions via efferent nerves.

Peripheral Nervous System (PNS)

Functions as a communication network between the CNS and the rest of the body.
Divided into two main divisions: Somatic and Autonomic.

Somatic Nervous System

Responsible for voluntary control of skeletal muscles.
Allows for conscious movement and coordination.

Autonomic Nervous System (ANS)

Regulates involuntary functions such as heartbeat and digestion.
Divided into two subdivisions:
Sympathetic Division: Prepares the body for "fight or flight" responses, increasing heart rate and energy mobilization.
Parasympathetic Division: Promotes "rest and digest" functions, conserving energy and enhancing digestion.