Practicum 3 Questions to Know
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28 Terms
What is a single extension from the soma (cell body)
Axon
What carries signals to the soma?
Dendrites
What is another name for the bulbous cell body of a neuron
Soma
What is within the cell body of a neuron?
The nucleus, nucleolus, nissl bodies, and mitochondria
Where are neurotransmitters stored within a neuron?
The synaptic terminal
What is the function of astrocytes?
They are glial cells that support neurons by attaching blood vessels to them
How do schwann cells protect nerve fibers?
They form myelin sheaths around the nerve fibers
Where is the third ventricle within the brain located?
Within the diencephalon
Where is cerebrospinal fluid located?
Within the subarachnoid space
What are the ridges of the cerebrum called?
The gyri
How many segments does the spinal cord have?
31
What plexus can the franic nerve be found?
The cervical plexus
What is the major nerve found in the lumbar plexus?
Femoral nerve
What are the 4 plexi of the spine?
cervical, brachial, sacral, and lumbar
How many nerves are in the cervical plexus?
8
What extends past the conus medullaris to anchor the spine to the coccyx?
Filum terminal
What does the ventral root consist of and what is its function?
The ventral root consists of motor neurons that carry information from the central nervous system to the affectors
Where must you insert in the spine to perform a spinal tap?
The subarachnoid space
What is the fissure that divides the left and right hemispheres of the brain?
The longitudinal fissure
What prevents the eyeball from collapsing?
The vitreous humor (posterior segment)
What part of the retina has the highest cone density?
The macula
What gland produces the sticky substance found in tears?
The tarsal gland
What are the 3 parts of the fibrous tunic?
The sclera, the cornea, and the cornea limbus
From the 3 layers of nerve found in the retina, which cells form the optic nerve?
Ganglion cells
What secretes cerumen and is found in the outer ear?
The ceruminous gland
What part of the ear does an otoscope exam?
The tympanic membrane
What part of the ear has to do with balance?
The inner ear
What part of the ear is the auditory tube a part of?
The middle ear