The Nervous System Flashcards
What is the functional unit of the nervous system?
The neuron
T or F
All cranial nerves are located within the skull
T
T or F
Ganglia are part of the CNS
F
They are part of the PNS
Nerves that come from the spine are called…
spinal nerves
Nerves that come from the brain are called…
cranial nerves
The central nervous system processes sensory information and coordinates an appropriate response through the …
PNS
The PNS can be divided into what two divisions?
The afferent and efferent divisions
T or F
The afferent division of the PNS is responsible for sending signals out of the CNS
F
The afferent division brings signals to the CNS
Which nervous systems act out motor commands from the CNS?
The somatic nervous system and the automatic nervous system
The CNS is composed of what two major anatomical parts?
the brain and spinal cord
List the 4 types of neurons
Anaxonic
Bipolar
Unipolar
Multipolar
What is unique about anaxonic neurons in comparison to other types?
Anaxonic neurons have no obvious axon
Where can anaxonic neurons be found?
In the brain and retina
Which type of neuron am I?
I am small with many dendrites
Anaxonic
What distinguishes bipolar neurons from other types of neurons?
They have one axon and one dendrite extending from the cell body
Where can bipolar neurons be found?
In the special senses
What distinguishes unipolar neurons from other types?
They have two axons and the cell body is to the side
Most sensory neurons are … neurons
unipolar
T or F
In a unipolar axon, the dendrites and axons are a single fused process.
T
What type of neuron are motor neurons (in terms of structure)?
Multipolar neurons
T or F
Multipolar neurons have three or more dendrites and one axon.
F
two or more dendrites
Interneurons link … and … neurons
sensory
motor
T or F
There are more neurons than glia in the body
F
There can be up to ten times more glia than neurons
T or F
Glia and neuroglia are interchangeable terms
T