Histology of the Nervous System

The nervous tissue is derived from the ______ germ layer.

The outer region of the brain is primarily composed of ______ matter, while the inner region of the spinal cord consists of ______ matter.

[Blank] are the phagocytes of the nervous tissue, migrating through the CNS to engulf infectious agents and cellular debris.

The ______ is the functional unit of nervous tissue, responsible for transmitting electrical and chemical signals.

[Blank] are equivalent to the rough endoplasmic reticulum in other cells and are responsible for protein synthesis in neurons.

A ______ neuron has a single axon and multiple dendrites, making it a common type of neuron in the central nervous system.

The ______ substance, formed by glial cells, insulates nerve fibers in the CNS and PNS, facilitating faster signal transmission.

The distinguishing microscopic features of different types of neurons are the number of processes, the positioning of the soma, and the arrangement of ______.

A key histological difference between gray matter in the cerebrum and the cerebellum is the arrangement of cells into cortical layers in the ______ and the presence of Purkinje cells in the ______.

[Blank] are glial cells responsible for myelinating axons within the central nervous system.

The meningeal layer directly attached to the surface of the brain and spinal cord is the ______.

The ______ mater is the middle meningeal layer and is characterized by a web-like appearance due to its trabeculae.

The outermost meningeal layer, notable for its thickness and attachment to the periosteum of the skull, is the ______ mater.

The ______ cells, line the ventricles of the brain and the central canal of the spinal cord aiding in the production and circulation of cerebrospinal fluid.

[Blank] form part of the blood-brain barrier, regulate interstitial fluid composition, and provide structural support to the CNS.

In the spinal cord, the ______ horns contain interneurons and receive sensory fibers, whereas the ______ horns contain multipolar motor neurons.

A ______ is a bundle of axons in the peripheral nervous system, while a ______ refers to a bundle of axons in the central nervous system.

A key difference between a spinal ganglion and an autonomic ganglion is the presence of ______ cell bodies in the spinal ganglion and ______ neuronal cell bodies in the autonomic ganglion.

The three layers of connective tissue in the PNS are the ______, ______, and ______.

[Blank] cells surround and insulate PNS axons and myelinate those with large diameters, allowing for faster action potential propagation.

In myelinated nerve fibers, the myelin sheath prevents ion flow except at the ______, enhancing the speed of conduction.

The ______ is the outer connective tissue coat of a nerve

The middle layer of connective tissue in a nerve, that surrounds each bundle of nerve fibers is the ______.

The connective tissue layer that surrounds individual nerve fibers is the ______.

Unlike oligodendrocytes, ______ cells only myelinate one axon segment.

[Blank] glial cells regulate the exchange of nutrients and waste for cell bodies in PNS ganglia.

The cerebral cortex layers include the Molecular layer, External granular layer, External pyramidal layer, Internal granular layer, Internal pyramidal layer and the ______ layer.

In the spinal cord, the ______ matter is peripherally located

In the spinal cord, the ______ horns contain interneurons and receives sensory fibers.

In regards to Central Nervous System, ______ myelinates and insulates CNS axons.

[Blank] are the cells that form part of the blood-brain barrier.

The ______ mater is consists of flattened mesenchymal derived cells.

The ______ cell is classified as phagocytic and moves throughout the Central Nervous System.

In the PNS the ______ cells surround and insulate axons and myelinate those having large diameters

A major function of ______ cells is to electrically insulate PNS cell bodies

In unmyelinated nerve fibers there is no multiple wrapping, smaller diameter axons and the ______ are still present.

In myelinated nerve fibers, the myelin sheath is responsible for preventing the loss of nerve ______.

The three components of Peripheral Nervous System include Nerve, ______ and Nerve Endings

The two types of Central Neuroglia are Protoplasmic and ______

The Cerebrum is divided between a ______ and White Matter

The ability of oligodendrocytes to speed up action potential propagation along axons is due to their capacity to ______ axons in the CNS.

Unlike neurons, ______ in the CNS can replicate to occupy spaces left by dying neurons, playing a role in tissue repair and maintenance.

Central nervous system support and organization are mainly provided by ______ because they regulate the interstitial fluid.

The brain's ventricles and the spinal cord's central canal are lined with ______, which aids in producing and circulating cerebrospinal fluid.

While both myelinated and unmyelinated nerve fibers rely on Schwann cells, only myelinated fibers benefit from multiple wrapping that forms a ______, increasing the speed of signal transmission.

Damage to the cerebellum can be assessed by analyzing the cells in the ______ layer because the layer is the output neurons integrating cerebellar cortical computation.

In the cerebral cortex, the multiform layer, also known as the polymorphic layer, is characterized by diverse cell types and is located next to the ______.

Unlike the cerebrum which has a less defined organization, the ______ contains granule cells for processing information.

The irregular connective tissue that is continuous with the periosteum of the skull is the ______ which provides critical protection for the brain.

The ______ is responsible for engulfing infectious agents and harmful substances to protect the CNS.

A key distinction between the white and gray matter in the central nervous system is that white matter primarily consists of myelinated nerve fibers, while gray matter is characterized by ______.

The dorsal horns of the spinal cord gray matter contain interneurons which are responsible for receiving inputs from sensory fibers, while the ventral horns contain ______ motor neurons.

Satellite cells in the peripheral nervous system perform similar support functions to astrocytes in the central nervous system, primarily by regulating the microenvironment and electrically ______ PNS cell bodies.

Because Schwann cells insulate and myelinate axons, they permit faster action potential propagation along axons in the ______.

In the peripheral nervous system, individual nerve fibers are surrounded by the ______, a layer of connective tissue that supports and insulates the axon.

While myelinated nerve fibers are insulated by a myelin sheath to prevent signal loss and are characterized by nodes of Ranvier, unmyelinated fibers lack such sheaths and have ______ axons.

A neuron characterized by a single axon and multiple dendrites is classified as a ______ neuron.

Structures such as Nissl bodies which are similar to rough endoplasmic reticulum are equivalent to rough endoplasmic reticulum in neurons, and are involved in ______ synthesis.

Unlike a nucleus, which is a cluster of neuron cell bodies within the central nervous system, a ______ is a cluster of neuron cell bodies in the peripheral nervous system.

Three layers of meninges protecting the CNS by limiting infection include the dura mater, the arachnoid mater, and the ______.

In contrast to the outer region of the spinal cord, the outer region of the brain primarily consists of blank matter which allows for protection.

Nervous tissue is derived from the ectoderm, which is the primary ______ layer of the embryo.

While peripheral nerves rely on epineurium, perineurium, and endoneurium for structural integrity, central nervous system tracts lack these distinct connective tissue layers and instead rely on ______.

In contrast to spinal ganglia, autonomic ganglia are characterized by processes that dictate specific responses in smooth muscle, cardiac muscle, of glands involving ______ neurons.

The functional unit of nervous tissue, responsible for transmitting electrical and chemical signals, is the ______.