which of the following cells belong in neural tissue neuron or neuroglia
Answers
Answer:
Nervous tissue
Explanation:
Structure. Nervous tissue is composed of neurons, also called nerve cells, and neuroglial cells. Four types of neuroglia found in the CNS are astrocytes, microglial cells, ependymal cells, and oligodendrocytes.
Answer:
haracteristics of Nervous Tissue
Nervous tissue is the main component of the nervous system, which includes the brain, spinal cord, and nerves.
LEARNING OBJECTIVES
Describe the characteristics of nervous tissue
KEY TAKEAWAYS
Key Points
Nervous tissue is one of four major classes of tissues and makes up the central nervous system and the peripheral nervous system.
Integration and communication are the two major functions of nervous tissue.
Nervous tissue contains two categories of cells — neurons and neuroglia.
Neurons are highly specialized nerve cells that generate and conduct nerve impulses.
Neuroglia are supporting cells that provide physical sport, remove debris, and provide electrical insulation.
Key Terms
myelin: A substance produced by cells of the neuroglia that increases the speed of impulses along the axon of the neuronal fiber.
nervous tissue: The principal constituent of the central and peripheral nervous system, comprised neurons and neuroglia cells.
brain: The control center of the central nervous system, located in the skull.
Nervous Tissue
Nervous tissue is one of four major classes of tissues. It is specialized tissue found in the central nervous system and the peripheral nervous system. It consists of neurons and supporting cells called neuroglia.
The nervous system is responsible for the control of the body and the communication among its parts. Nervous tissue contains two categories of cells—neurons and neuroglia.
Neurons
Neurons are highly specialized nerve cells that generate and conduct nerve impulses. A typical neuron consists of dendrites, the cell body, and an axon.
Dendrites
Dendrites are responsible for responding to stimuli; they receive incoming signals towards the cell body. The axons are responsible for transmitting impulses over long distances from cell body. The cell body is like a factory for the neuron. It produces all the proteins and contains specialized organelles such as nucleus, granules and Nissl bodies.
This image illustrates the parts of a neuron, depicted as a nucleus surrounded by a randomly shaped cell body with many arm-like dentrites on its edges. The dendrites receive incoming signals. The axons send signals away from the neuron cell body, represented as beads on a chain in the picture. The myelin sheath surrounds and insulates the axon beads, the node of Ranvier links each axon to the next one, and the Schwann cells inside each axon increase the speed of the signal as it moves towards the axon terminal. The axon terminal is shown as several branches emerging from the last axon in the chain.
Neuron: This image illustrates the parts of a neuron. The dendrites receive incoming signals while axons propagate signals away from the neuron cell body. The myelin sheath surrounds and insulates the axon.
Dendrite
The axon is surrounded by a whitish, fatty layer called the myelin sheath. Outside the myelin sheath there is a cellular layer called the neurilemma.
Schwann Cells
In the peripheral nervous system, Schwann cells are neuroglia cells that support neuronal function by increasing the speed of impulse propagation. The Schwann cells are underlain by the medullary sheath. The medullary sheath is interrupted at intervals by the nodes of Ranvier.
image
Illustration of the Schwann Cells and the Myelin Sheath: Transmission electron micrograph of a myelinated axon. The myelin layer (concentric) surrounds the axon of a neuron, showing Schwann cells.
Types of Nervous Tissue
The nervous system consists of nervous tissue, which is composed of two principal types of cells called neuron and neuroglia.
LEARNING OBJECTIVES
Describe the main cells that comprise nervous tissue
KEY TAKEAWAYS
Key Points
Nervous tissue is composed of neurons and supporting cells called neuroglia, or ” glial cells.”
There are six types of neuroglia. Four are found in the central nervous system, while two are found in the peripheral nervous system.
The four types of neuroglia found in the central nervous system are astrocytes, microglial cells, ependymal cells, and oligodendrocytes.
The two types of neuroglia found in the peripheral nervous system are satellite cells and Schwann cells.
Neurons are the other the other type of cell that comprise nervous tissue. Neurons have cell bodies, dendrites, and axons.
Key Terms
neuron: The main cell type in nervous tissue.
neuroglia: Supporting cells in nervous tissue.
Nervous tissue, one of the four main tissue types, is composed of neurons and supporting cells called neuroglia. Neuroglia are also called “glial cells.”
Neuroglia
There are six types of neuroglia—four in the central nervous system and two in the PNS. These glial cells are involved in many specialized functions apart from support of the neurons. Neuroglia in the CNS include astrocytes, microglial cells, ependymal cells and oligodendrocytes. In the PNS, satellite cells and Schwann cells are the two kinds of neuroglia.