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Nervous System, Endocrine
Quiz and Midterm
28
Anatomy
Undergraduate 1
04/30/2008

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Cards

Term
Central Nervous System     
Definition
Includes brain and spinal cord
Term
Peripheral Nervous System
Definition
peripheral nerves - 2 parts
Term
Sensory Divison of the Peripheral Nervous System
Definition
sends information to the CNS
Term
The Motor Division of the Peripheral Nervous System  
Definition
sends info from CNS to muscles or glands.  2 subdivisons.
Term
Autonomic Nervous System of the Motor Divison of the Peripheral Nervous System
Definition
automatic responses and regulatory functions.  Controls smooth muscle, cardiac muscle, and glands.  2 subdivisons.
Term
Sympathetic Nervous System of the Autonomiv Nervous System of the Motor Division of the Peripheral nervous system
Definition
involved in fight or flight
Term
parasympathetic nervous system of the autonomic nervous system of the motor division of the peripheral nervous system.
Definition
involved in resting and digesting
Term
somatic nervous system of the motor dicision of the peripheral nervous system
Definition
voluntary control.  control skeletal muscle.
Term
neurons  
Definition
nerve cells.  3 regions
Term
dendrites
Definition
many of these and branched. they receive information from other neurons or from the environment and conduct impules to the cell body of the neuron.
Term
cell body  
Definition
contains organells, necessary for life of neuron.  cell bodies found in CNS
Term
Axon
Definition
only one per neuron.  conduct impulses (actin potentials or nerve messages) away from cell body of neuron
Term
Glia (neuroglia)
Definition
supporting cells. they support and help the neurons - several types:
Term
schwann cells  (neuroglia)
Definition
wrap around axons to insulate
Term
astrocyes (neuroglia)
Definition
surround vessels, contribute to the blood barriers
Term
microglia (neuroglia)
Definition
injury responsive scavangers - keep the area around the neurons clean
Term
oligodendrocyte (neuroglia)
Definition
wrap around axons of multiple cells to insulate thsoe axons.
Term
classifications
Definition
according to direction they carry info
Term
sensory neurons - Afferent
Definition
take info from receptors to the CNS
Term
interneurons
Definition
occur within the CNS and integrate the input
Term
motor neurons - Efferant
Definition
take info from the CNS to muscles and glands.
Term
nerves
Definition
made of many axons bundled together, covered with fibrous connective tissue.
Term
endoneurium - nerve covering
Definition
surrounfs individual fibers within a nerve
Term
perineurium - nerve convering
Definition
surrounds a group (facicle) of nerve fibers
Term
Epineurium - nerve covering
Definition
surrounds entire nerve
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