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nervous system

Terms

undefined, object
copy deck
-algia
pain
-esthesia
perceive sensations
-mural
wall
-plegia
paralysis
a rapid, automatic response to a stimulus
reflex
af-
toward
afferent
impulse originates in the periphery and travels to the CNS
anatomically distinct collection of neuron cell bodies located in the PNS
ganglion
aunomic nervious system
often referred to as "visceral motor system" has two divisions, sympathetic and parasympathetic; consists of fibers that innervate involuntary (smooth) muscle, cardiac muscle, and glands
axon
nerve fiber, cytoplasmic process of the cell body
bundle of axons in the PNS, which are held together by layers of connective tissue
nerve
bundle of axons located in the CNS
tract
cell body
part of the neural cell containing the nucleus and other cellular organelles
cell/organ that is selectively affected by a particular agent
target tissue
chemicals released into the synapse that allow transmission of the electrical impulse to another cell; allow communication between cells as the synapse
neurotransmitters
CNS tissue that is predominantly myelinated axons; organized into tracts
white matter
CNS tissue which contains a predominance of nerve cell bodies and non-myelinated axons
gray matter
collection of neuron cell bodies located in the CNS
nucleus
complex, interwoven network of peripheral nerves
plexus
cytoplasmic processes that extend from the neuron cell body; similar in structure to axons, but typically form a tree-like branching pattern; comprise most of the receptor surface of a neuron
dendrite
dendrite
cytoplasmic processes that extend from the neuron cell body; similar in structure to axons, but typically form a tree-like branching pattern; comprise most of the receptor surface of a neuron
ef-
away
effector organ (tissue)
organ/ tissue that produces an effect, e.g. contraction or secretion
from the Greek word soma, which means "body;" transmits sensations of touch, pain, temperature, and proprioception from sensory receptors in skin, mucosa, skeletal muscles and joint capsules; in other words, provides info about the external environment, a
symatic nervous system
ganglion
anatomically distinct collection of neuron cell bodies located in the PNS
gray matter
CNS tissue which contains a predominance of nerve cell bodies and non-myelinated axons
inter-
between
intra-
within
nerve
bundle of axons in the PNS, which are held together by layers of connective tissue
nerve fiber, cytoplasmic process of the cell body
axon
neuron
type of cell specialized to conduct electrical impulses
neurotransmitters
chemicals released into the synapse that allow transmission of the electrical impulse to another cell; allow communication between cells as the synapse
nucleus
collection of neuron cell bodies located in the CNS
often referred to as "visceral motor system" has two divisions, sympathetic and parasympathetic; consists of fibers that innervate involuntary (smooth) muscle, cardiac muscle, and glands
aunomic nervous system
organ/ tissue that produces an effect, e.g. contraction or secretion
effector organ (tissue)
part of the neural cell containing the nucleus and other cellular organelles
cell body
plexus
complex, interwoven network of peripheral nerves
receptor, sensory neuron, motor neuron, and effector involved in a particular reflex
reflex arc
reflex
a rapid, automatic response to a stimulus
reflex arc
receptor, sensory neuron, motor neuron, and effector involved in a particular reflex
somatic nervous system
from the Greek word soma, which means "body;" transmits sensations of touch, pain, temperature, and proprioception from sensory receptors in skin, mucosa, skeletal muscles and joint capsules; in other words, provides info about the external environment, a
specialized site where a neuron communicates with another cell
synapse
synapse
specialized site where a neuron communicates with another cell
target tissue
cell/organ that is selectively affected by a particular agent
tract
bundle of axons located in the CNS
type of cell specialized to conduct electrical impulses
neuron
white matter
CNS tissue that is predominantly myelinated axons; organized into tracts
what is the functional unit of hte nervous system
neurons
Sensory neurons carry information to or away from the Central Nervous System
to
Motor neurons carry info to or away from teh Central Nervous System
away
Effectors within the body are ____ and ____. They respond directly to which type of neuron info?Sensory or motor
Muscles and Glands; Motor
Define an action potential
Rapid change in charge at one point on the axon membrane. an electrical signal that travels down the axon. If hte sum total is negative, no action potential is generated.
What is the resting membrane potential in mV
-70 mV
Fiber that carries info away from the cell body
axon
house the nucleus and it integrates processes the incoming info
cell body
fiver that receives incoming messages
dendrite
insulatin material produced by schwann cells
myelin sheath
Repolarization (+30mV to -70mV)
K+ out of cell
Depolarization (-50 to +30mV)
Na+ into cell
True or False. ACtion potentials come in diff strenths..some weak and some strong.
false. must be positively charged
When do gated soidum channels open?
after depolarization
myelinated fibers carry information faster or slower
faster
true or false. the neuron creates the myelin sheath.
False. schwann cells
The area where a neuron communicates with another cell
synapse
Where would you find neurotransmitters stored in vesicles?
presynaptic membrane
Where would you find receptors for neurotransmitters
postsynaptic membrance
Neurotransmitters are the _____ of the nervous system.
chemical information. over 25 known to work int eh human body. may be excitatory or inhibitory.

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