HS120 Unit 7
Order by
24 terms
Terms | Definitions |
|---|---|
 central nervous system | (CNS: that part of the nervous system made up of the brain and spinal cord) |
| peripheral nervous system | PNS: that part of the nervous system lying outside of the brain and spinal cord, the nerves of the body) |
| neuron nerve cells | made up of a cell body, dendrites and an axon |
| glial cell | also called neuroglia; "glia" means "glue", they are the supporting cells of the nervous system |
| sensory neurons | transmit sensory impulses from all parts of the body to the spinal cord and brain |
| motor neurons | transmit impulses from the brain and spinal cord to muscles and glandular tissue |
| interneurons | connect sensory and motor neurons |
| afferent neuron | another name for a sensory neuron |
| efferent neuron | (another name for a motor neuron) |
| myelin | a white, fatty substance that wraps around the axons of some nerves to increase the speed of conduction of the impulse |
| nodes of Ranvier | bare spots on and axon where there is no myelin |
| Schwann cell | a cell in the peripheral nervous system responsible for producing myelin |
| nerve | a group of peripheral nerve cell fibers bundled together |
| tract | group of nerve cell bodies in the peripheral nervous system |
| saltatory conduction | conduction (the method by which an electrical impulse "jumps" from node to node |
| synapse | the area where electrical impulses are transmitted from one neuron to another |
| medulla oblongata | enlarges upward extension of the spinal cord |
| CVA | a cerebrovascular accident or stroke, the third most common cause of death in the USA |
| dura mater | the outermost layer or covering of the brain and spinal cord, literally means "tough mother") |
| arachnoid mater | the middle meninge or covering of the brain and spinal cord, means "spider like" |
| pia mater | innermost membrane or meninge covering the brain and spinal cord, means 'tender mother") |
| sympathetic nervous system | one of the divisions of the autonomic nervous system, often referred to as "fight or flight" |
| parasympathetic nervous system | one of the divisions of the autonomic nervous system, often referred to as "rest and digest") |
| neurotransmitter | chemicals used for communication between neurons; examples include dopamine, epinephrine and acetylcholine |
First Time Here?
Welcome to Quizlet, a fun, free place to study. Try these flashcards, find others to study, or make your own.
Set Champions
Scatter Champion
22.2 secs by osufanlevi
Space Race Champion
3,360 points by kaybob63
Speller Champion
98.0% correct by lilteague
Completed “Learn” mode
lilteague , KathyBaker19 , Tiffanyaok , osufanlevi , FlorencePena , Laria , samuelguthrie