Nervous Tissue

Neuron and neuroglia

Two types of cells that comprised the nervous tissue

functional, anatomical unit

Neuron is the ____ and ______ structure of the nervous tissue and nervous system in general

cell body, cellular processes

Parts of neuron

cell body

This part of neuron contains the nucleus and the other cell organelles

axon or nerve fiber, dendrites

Cellular processes contains…

longest cellular process, myelinated, unmyelinated, telodendria, away

Axon or nerve fiber is the _________ which either ____ or ______, its end bifurcates as ______; this part also carry the information ___ from the cell body

short, towards

Dendrites are _____ cellular process which carry impulses ____ the cell body

from left to right:

Unipolar, bipolar, pseudounipolar, multipolar

Identify the different types of neuron as to structure

multipolar neuron

Type of neuron that has many dendrites and one neuron

Bipolar neuron, ear, eye

Has one dendrite and one axon. This type of neuron can only be found in the ___ and ____.

only axon, no dendrites

Unipolar neuron has ___ emanating from the cell body and _____.

sensory neuron

example of unipolar neuron

receptors, axon, brain, spinal cord

The dendrites of unipolar neuron are found in the _____ and ___leads to the ____ or _____

bifurcates at a distance

Pseudounipolar neuron has axon that ________________ from the cell body.

ganglion cells

example of pseudounipolar neuron

1. association / interneuron

2. motor neuron

3. sensory neuron

types of neuron as to function

Association / interneuron

A multipolar neuron which connects other neurons together such as sensory with motor neuron.

innervates an effector

Motor neuron is a multipolar and ___________ such as muscle, gland, heart, etc.

peripheral, receptor, motor or interneuron

Sensory neuron is unipolar, its single axon connects to dendrites at the _______ end which receive stimuli from a ____ and then axons enters the CNS to connect to _____ or ______

Top to bottom:

1. Astrocyte

2. Oligodendrocytes

3. Microglia

4. Ependymal cell

Identify the Neuroglial Cells of the CNS

myelin sheaths

Oligodendrocytes forms __________ around axons in the CNS

True

One oligodendrocyte can form myelin sheaths along more than one internode of more than one axon. (True/False)

they have smaller cell bodies than astrocytes and relatively fewer processes leaving the cell body

Compare oligodendrocytes from astrocytes

Schwann cells

This neuroglia produce the myelin sheath in the PNS

protects, insulates, micro-environment, regenerate, re-establish, saltatory conduction

Myelin sheath _____ and _____ axon, maintains their ______, and enables them to _____ and ____ connection with the receptors or effectors, enables _______

main phagocytic cell, antigen-presenting cells

Microglia is the ______ and _______ in the CNS

Microglia

This neuroglia have the smallest cell bodies

columnar cells, fluid-filled cavities

Ependymal cells are_______ lining the ________ of the brain and spinal cord.

production, transport, and circulation of cerebrospinal fluid

What is the role of ependymal cells?

Astrocytes

Star-shaped glial cells

1. protoplasm

2. fibrous

Two types of astrocytes

physical support, clean up, brain

Astrocytes provide _____ to neurons and ______ debris within the _____

1. Provides nourishment

2. Provides some of the chemicals needed for proper functioning and help control the chemical composition of the surrounding neurons

What are the other stuff that astrocytes provide to neurons?