Afferent nerves - Correct Answer sensory nerves that carry impulses from the cells, tissues, and
organs to the CNS system.
Efferent nerves - Correct Answer carry impulses from the CNS to cells, tissues, and organs, motor
nerve
Central Nervous System - Correct Answer brain and spinal cord
peripheral nervous system - Correct Answer *12 cranial nerves and 31 spinal nerves
*further subdivided into the somatic nervous system and the autonomic nervous system
* PNS has the afferent and efferent pathways
Neuron - Correct Answer * basic functional unit of the nervous system
* fueled by glucose
* 3 parts to a neuron
- cell body
, - dendrite
- axon
* mostly in the CNS and called nuclei in a group
* in the PNS the groups are called ganglia or plexus
* dendrites- projections that collect information and direct it to the cell body
* Axon- conducts impulses to the next neuron, axons are covered in myelin sheaths that are lipid
material, the myelin sheaths are interrupted in certain spots by the nodes of Ranvier
* Myelin sheath- allows impulses to flow between the nodes of Ranvier in an increased velocity
called the salutatory conduction.
* mature neurons do not replicate and injury to them is permanent
* grey matter
Sensory neurons - Correct Answer afferent neurons that carry impulses to the CNS
motor neurons - Correct Answer efferent neurons that carry away from the CNS
associational neurons - Correct Answer transmit impulses form neuron to neuron and only found in
the CNS
axonal reaction - Correct Answer process in which the peripheral nerves are capable of self repair
neuroglia - Correct Answer 4 different types
- astrocytes
- oligodendroglia
- microglia
- ependymal cells
neuroglia- astrocytes - Correct Answer * fill space between neurons and surround blood vessels
* part of the blood brain barrier
* provide rapid transport for nutrients
* has a role in scar formation and seizures
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