Nervous Tissue Flashcards
What sections are the ones with cell bodies?
CNS - Gray matter
PNS - Ganglia
White matter and nerves don’t have cell bodies.
What type of neurons are the most abundant?
The multipolar neurons
1 Axon and more than one dendrite.
Whta are the neurons found in sensory organs?
Bipolar neurons
1 axon and 1 dendrite
Vestibular-chroclea system
What type of chromatin contaisn the nucleus of neurons?
Euchromatin
Uncondensed, active.
What are Nissl bodies?
Structure in the soma of neurons containing RER and polyribosomes.
The presence of dendritic spines, which increase the surface area available for synapse decreases because of…
Age and poor nutrition.
Where is the ellectrical impulse generated?
In the Axon Hillock
What type of stain do we have to use to differenciate neuroglial cells?
Gold and silver stainig.
Which are the largest neuroglial cells?
Astrocytes
Which cells are related with the formation of the blood-brain barrier?
Protoplasmic Astrocytes
Which cells form the scar tissue (glial scar)?
Astrocytes
Which astrocytes are found in gray matter and which ones are found in white matter?
Protoplasmic Astrocytes: Gray Matter
Fibrous Astrocytes: White Matter
Which type of astrocytes have long, slender processes with few branches?
Fibrous astrocytes
Of what protein are made the intermediate filaments?
Glial Fribilar Acidic Protein
Which glial cells are necessary for the survival of neurons?
Oligodendrocytes
As they produce the myelin sheaths and protects the axons of neurons.
True or False
Each Oligodendrocyte can myelinate several axons
TRUE
Which are the phagocytic nueroglial cells?
Microglia
What are the cells that move the cerebrospinal fluid with cilia?
The Ependymal Cells
Form the neuroepithelium.
True or False
One Schwann cell can insulate several axons
FALSE
One Schwann cell can only insulita a SINGLE axon in a myelinated fiber.
What type of synapse is faster?
The Electrical Synapse
What type of synapse is most common?
The chemical synapse
There is lots of vesicles in the …
Presynaptic membrane
Axon terminal
How is the surface increased in the neuromuscular junction (motor end plate)?
With junctional folds.
How are the gaps called between adjacent glial cells (Schwann cells)?
Nodes of Ranvier
How are covered the nodes of Ranvier in the CNS?
It is covered by a foot plate of an astrocyte.
Schwann cells in unmyelinated axons how many axons they can cover?
They can cover several axons.
In what type of nerve fibers (Myelinated/Unmyelinated) the propagation of the impulse is faster?
In myelinated axons
As the impulses jump from one node of Ranvier to another.
In the CNS unmyelinaed axons are enveloped by neuroglial cells (Oligodendrocytes)?
No
What connective tissue layer forms the blood-nerve barrier?
The perineurium
Which type of matter contains Neuronal cell bodies (soma)?
The gray matter
