Anatomy and Physiology Bio 252 - Lecture
Exam 1 Questions and Correct Answers
BIOS 252: | BIOS 252 ANATOMY & PHYSIOLOGY II (BIOS252)Anatomy
~~~ The study of structure
Physiology
~~~ The study of function
Homeostasis
~~~ Adjusting to maintain a constant internal environment that makes po...
✓ ~~~ Whitish, fatty (protein-lipid) segmented coating around most (not all) long axon
that is made out of other cells that are not neurons.
Functions of the Myelin Sheath
✓ ~~~ 1. Protect the axon
2.Electrically insulate fibers
3. Increase speed of nerve impulse transmission
Fascicles
✓ ~~~ Bundles of axons
Types of neuroglia cells in the CNS
✓ ~~~ 1. Astrocytes
2. Microglia
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, 3. Oligodendrocyte
4. Ependymal Cells
* These cells CANNOT generate action potential
Astrocytes
✓ ~~~ Support and brace neurons, and control the chemical environment
Microglia
✓ ~~~ The immune cells of the CNS. They phagocytose.
Oligodendrocytes
✓ ~~~ The insulators of the thick neurons. Responsible for the myelin sheath of the
CNS.
Ependymal Cells
✓ ~~~ Cells responsible for circulating the CSF. Line the central cavities of the brain
and spinal column. Bring in nutrients and filter out waste.
Hydrocephalous
✓ ~~~ A condition in which there is excess cerebropspinal fluid in the brain. The result
of ependymal cells not functioning properly.
Types of neuroglia cells in the PNS
✓ ~~~ 1. Schwann Cells
2. Satellite Cells
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