The Nervous System: Definition, Function, and Physiology Quiz

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16 Questions

What is the main signaling device used by the nervous system to communicate with body cells?

Electrical impulses

Which of the following is NOT one of the overlapping functions of the nervous system?

Cognitive Processing

What are the two subdivisions of the structural classification of the nervous system?

Central Nervous System and Peripheral Nervous System

Which organs form the central nervous system (CNS)?

Brain and Spinal Cord

What is the main activity of the central nervous system (CNS)?

Interpreting incoming sensory information and issuing instructions

What is the main function of the peripheral nervous system (PNS)?

Controlling voluntary movements and reflexes

Which part of the nervous system consists mainly of the nerves that extend from the brain and spinal cord?

Peripheral Nervous System (PNS)

What do cranial nerves carry impulses to and from?

Brain

Which division of the functional classification scheme is concerned only with PNS structures?

Sensory Division

What does the sensory division keep the CNS constantly informed of?

Both inside and outside the body

What is the subdivision of the motor division that allows us to consciously control our skeletal muscles?

Somatic Nervous System

Which part of the autonomic nervous system typically inhibits what the sympathetic nervous system stimulates?

Parasympathetic Nervous System

What are neurons highly specialized to transmit?

(Nerve Impulses) Messages

Which type of fibers transmit impulses from the skin, skeletal muscles, and joints?

Somatic Sensory Fibers

(Visceral Sensory Fibers) Visceral afferents transmit impulses from which part of the body?

(Visceral Organs)

(Skeletal Muscle Reflexes), like the stretch reflex, are initiated involuntarily by which motor division?

(Somatic Nervous System)

Study Notes

Nervous System Overview

  • The main signaling device used by the nervous system to communicate with body cells is the neuron.

Function and Classification

  • The nervous system has overlapping functions, EXCEPT for the function of reproducing cells.
  • The structural classification of the nervous system has two subdivisions: Central Nervous System (CNS) and Peripheral Nervous System (PNS).

Central Nervous System (CNS)

  • The CNS consists of the brain and spinal cord.
  • The main activity of the CNS is to integrate and process information.

Peripheral Nervous System (PNS)

  • The main function of the PNS is to transmit information between the CNS and the rest of the body.
  • The PNS consists mainly of nerves that extend from the brain and spinal cord.
  • Cranial nerves carry impulses to and from the CNS.

Functional Classification

  • The somatic nervous system is a division of the functional classification scheme concerned only with PNS structures.
  • The sensory division keeps the CNS constantly informed of internal and external stimuli.
  • The motor division has two subdivisions: Somatic Nervous System (allows conscious control of skeletal muscles) and Autonomic Nervous System (controls involuntary actions).

Autonomic Nervous System

  • The parasympathetic nervous system typically inhibits what the sympathetic nervous system stimulates.

Neurons and Fibers

  • Neurons are highly specialized to transmit electrical and chemical signals.
  • Visceral afferents transmit impulses from the viscera (internal organs).
  • Visceral sensory fibers transmit impulses from the skin, skeletal muscles, and joints.
  • Skeletal muscle reflexes, like the stretch reflex, are initiated involuntarily by the somatic motor division.

Test your knowledge about the definition, function, classification, neurons, physiology of neurotransmission, nerve impulse, PNS, and CNS of the nervous system. Explore the master controlling and communicating system of the body and its signaling mechanisms.

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