The Nervous System - 1 Flashcards
Name the two divisions of the nervous system.
Central Nervous System (CNS)
Peripheral Nervous System (PNS)
What is the CNS made up of?
Brain and Spinal cord
What is the PNS made up of?
Nerves and Ganglia
Where are nerves and ganglia found?
THe Peripheral Nervous System
What are the two types of nerves?
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What is a nerve?
a bundle of axons
What is a bundle of axons?
a nerve
What is a ganglia?
Bundle of cell bodies outside of the CNS
What do you call a bundle of cell bodies outside of the CNS?
Ganglia
What are the two divisions of the PNS?
Sensory Division
Motor Division
What makes up the sensory division of the PNS?
Visceral
Somatic
What makes up the motor division of the PNS?
Visceral (aka autonomic)
Somatic
What makes up the visceral division of the motor division of the PNS?
Sympathetic
Parasympathetic
What do sympathetic and parasympathetic divisions belong to?
The Visceral part of the motor division of the PNS
Name two types of nervous tissue cell types?
Neuron
Neuroglia
What is a neuron?
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What is a neuroglia?
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Name the three structures of a neuron.
Dendrites
Cell body (aka Soma)
Axon
What is an myelinated axon?
White matter-
What is an unmyelinated axon?
Grey matter
Which direction does an impulse travel?
Dendrite to axon
What makes up a the cell body (soma) of a neuron?
Nissl bodies
Nucleus
What two ways are neurons classified?
Function
Shape
How are neurons classified by function?
Sensory (aka afferent) neurons
Association neurons (aka Interneurons)
Motor (aka efferent) neurons
What is the function of a sensory neuron?
Bringing info into the brain. From outside body or inside body
What is the function of an association neuron?
Neurons that communicate btw two other neurons.
What is the function of a interneuron?
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What is the function of a motor neuron?
-
What is the function of an afferent neuron?
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What is the function of an efferent neuron?
-
Where are interneurons found?
CNS
What neurons are found in the CNS?
Association neurons (aka interneurons)
What neuron makes up 90% of neurons in your body?
association neurons (interneurons)
How are neurons classified by shape?
Multipolar
Bipolar
Unipolar
What neurons are multipolar?
Motor
Association
What neurons are bipolar?
Sensory - nose and eyes