Steric Hindrance and Combinations of Major and Minor Splice Sites are major reasons behind alternative splicing (Mutually Exclusive Splicing) 

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#Unit 7. System Physiology – Animal

There are two major types of glial cells in the vertebrate nervous system:

Microglia

Macroglia

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#Unit 7. System Physiology – Animal

Microglia 

arise from macrophages outside of the nervous system are scavenger cells that resemble tissue macrophages and remove debris resulting from injury, infection, and disease.

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#Unit 7. System Physiology – Animal

There are three types of macroglia:

Oligodendrocytes

Schwann cells

Astrocytes

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#Unit 7. System Physiology – Animal

Oligodendrocytes are involved in myelin formation around axons in the CNS.

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#Unit 7. System Physiology – Animal

Schwann cells are involved in myelin formation around axons in the peripheral nervous system.

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#Unit 7. System Physiology – Animal

Astrocytes, which are found throughout the brain, are of two subtypes:

Fibrous astrocytes

Protoplasmic astrocytes