Anatomy 10/6/06
Terms
undefined, object
copy deck
- Interneurons (where, what, and how)
-
-in CNS
-multipolar
-takes info to CNS and brings back a synapse to interneurons - Ganglion (what)
- collection of nerve cell bodies outside the CNS
- Nucleus (what)
- collection of nerve cell bodies inside the CNS
- synapse (what)
- connections b/t neurons
- presynaptic (what)
- neuron before a synapse
- postsynaptic (what)
- neuron after a synapse
- electrical synapse (where and how)
-
-found in cardiac muscle
-ions pass through gap junctions - chemical synapse (how)
- -neurological info transmitts from neuron to neuron or neuron to mucle using neuro transmitters
- How does a neuron function at rest?
-
-neurons at rest are polarized
-net positive charge outside membrane and net negative charge in cytoplasm - How does a neuron function during a stimulus?
-
-stimulus makes neurons permiable to sodium ions and they enter the neuron
-depolarized - How does a neuron function when a stimulus ends?
-
-When impulse leaves a particular neuron, Na+ gets escorted back outside the membrane
-repolarized - Glial cells (where and what)
-
-in CNS and PNS
-protect and nurture other cells - What are the 6 types of glial cells?
-
1. Neurolemmocytes
2.Oligodendrocyte
3.satellite cells
4.ependymal cells
5.astrocytes
6.microglia - Neurolemmocytes (what and where)
-
-Schwann cells
-makes myelin sheath
-in PNS - Oligodendrocyte (what and where)
-
-makes myelin sheath
-supplies myelin for several adjacent neurons
-in CNS - What is the true function of myelin sheath? Why broken up in blocks?
-
-to make sure impulses go where you want it to go
-to increase the speed of impulse - Satellite cells (where, what)
-
-in posterior root ganglion
-outside CNS
-surround nerve cell bodies
-maintain and repair nerve cells - Ependymal cells (what and where)
-
-synthesize and circulate cerebrospinal fluid (CSF)
-ciliated, helps circulate CSF
-along the edge central canal of spinal cord - Cerebrospinal fluid (what,how,where)
-
-cushons and protects brain
-collects metabolic wastes
-suppliments blood supply
-provides nutrients
-in and around brain and spinal cord - Astrocytes (what)
- -create and maintain the blood-brain barrier (BBB)
- Blood-brain barrier (what, how)
-
-keeps metabolic wastes out of CNS
-keeps some medicinal molecules out of brain
-surrounds capillaries in CNS (simple squamous cells-not perforated) - Microglia (what, how)
-
-macrophage
-"trash cans" of the CNS
-keeps CNS clean
-phagocytize metabolic wastes