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Test # 1
Neurons
10
Physiology
Undergraduate 3
02/10/2010

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Term
Nervous System: 2 Parts
Definition
Central Nervous System and Peripheral Nervous System: Afferent (Sensory) neurons and Efferent.
Term
Afferent (Sensory) Neurons
Definition
Continiuously monitor conditions in internal and external environment.
Term
Cells of Nervous System
Definition
Neurons (basic signaling units of nervous system) and Glial cells (support cells)
Term
Dendrites
Definition
receive incoming signals. Increase the surface area of neurons so that several of them can communicate at one time.
Term
Axons
Definition
Carry outgoing information. Originate from axon hillock.
Term
Interneurons
Definition
Neurons that lie entirely within the CNS.
Term
Nerves
Definition
Long axons of afferent and efferent peripheral neurons bundled together into cord-like fibers. They extend from the CNS to the targets of cocmpnents neurons. They can carry afferents and/or efferents.
Term
Schwann Cell
Definition
Wraps around the axon several times.
Term
Schwann Cell Nucleus
Definition
Pushed to outside of myelin sheath.
Term
Myelin
Definition
Consists of multiple layers of cell membrane.
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