Podcast
Questions and Answers
What is the main signaling device used by the nervous system to communicate with body cells?
What is the main signaling device used by the nervous system to communicate with body cells?
Which of the following is NOT one of the overlapping functions of the nervous system?
Which of the following is NOT one of the overlapping functions of the nervous system?
What are the two subdivisions of the structural classification of the nervous system?
What are the two subdivisions of the structural classification of the nervous system?
Which organs form the central nervous system (CNS)?
Which organs form the central nervous system (CNS)?
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What is the main activity of the central nervous system (CNS)?
What is the main activity of the central nervous system (CNS)?
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What is the main function of the peripheral nervous system (PNS)?
What is the main function of the peripheral nervous system (PNS)?
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Which part of the nervous system consists mainly of the nerves that extend from the brain and spinal cord?
Which part of the nervous system consists mainly of the nerves that extend from the brain and spinal cord?
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What do cranial nerves carry impulses to and from?
What do cranial nerves carry impulses to and from?
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Which division of the functional classification scheme is concerned only with PNS structures?
Which division of the functional classification scheme is concerned only with PNS structures?
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What does the sensory division keep the CNS constantly informed of?
What does the sensory division keep the CNS constantly informed of?
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What is the subdivision of the motor division that allows us to consciously control our skeletal muscles?
What is the subdivision of the motor division that allows us to consciously control our skeletal muscles?
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Which part of the autonomic nervous system typically inhibits what the sympathetic nervous system stimulates?
Which part of the autonomic nervous system typically inhibits what the sympathetic nervous system stimulates?
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What are neurons highly specialized to transmit?
What are neurons highly specialized to transmit?
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Which type of fibers transmit impulses from the skin, skeletal muscles, and joints?
Which type of fibers transmit impulses from the skin, skeletal muscles, and joints?
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(Visceral Sensory Fibers) Visceral afferents transmit impulses from which part of the body?
(Visceral Sensory Fibers) Visceral afferents transmit impulses from which part of the body?
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(Skeletal Muscle Reflexes), like the stretch reflex, are initiated involuntarily by which motor division?
(Skeletal Muscle Reflexes), like the stretch reflex, are initiated involuntarily by which motor division?
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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.
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Description
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.
