Nerve
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What are the 2 main parts of the nervous system?
• Central Nervous System 2. Peripheral Nervous System
What are the 2 principal cells of nerve tissue?
• Neurones 2. Neuroglial Cells
Name 5 types of neuroglial cells
• Astrocytes • Schwann Cell • Ependymal Cell • Microglia • Oligodendrocytes
What are the 3 main parts of a neuron?
• Body • Dendrites • Axon
What is an alternative name for a cell body?
Soma
What are 2 ways to classify neurons?
• Structurally 2. Functionally
What are 3 structural classifications of neurons?
• Bipolar • Multipolar • Pseudounipolar
What 3 senses are typically related to bipolar neurons?
• Sight • Sound • Balance
What is the typical function of multipolar neurons?
Motor neuronal function
What is the typical function of pseudounipolar neurons?
Sensory neuronal function
Where is 1 place that pseudounipolar neurons found?
Dorsal root ganglions
What are Nissl bodies?
Combination of free ribosomes and rough ER found in neuron cell body
Where are organelles found in the neuron?
Cell body - Can be in dendrite but never axon
What is the function of an axon?
Transmit an electrical impulse from cell body to axonal ending
What is the function of neurotubules?
Facilitate rapid transport of synaptic vesicles along axon
What produces the myelin sheath?
Schwann Cells / Oligodendrocytes
What is myelin?
Lipid rich insulator
What is the function of myelin?
Allows for increased conduction velocity of electrical impulse along axon
What is the gap between one myelinating cell and the next called?
Node of Ranvier
What is the epineurium?
Protective layer surrounding the entire nerve
What type of CT is epineurium?
Dense Irregular CT
What is the perineurium?
Protective layer surrounding the nerve fascicle
What type of CT is perineurium?
Loose CT
What is the endoneurium?
Protective layer which occurs between the nerve fibres within each fascicle