divergence
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the act of splitting off into different directions
The nervous system can distinguish between a light touch and a heavier touch for a
given duration of stimulus because:
a) weak stimulus generates a weaker action potential
b) frequency of impulses generated is lower for lighter
touch
c) threshold to generate an action potential is lower for
lighter touch
d) the length of the refractory period is modified
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, b) frequency of impulses generated is lower for lighter
touch
How many postganglionic fibers can preganglionic fibers synapse with in the SNS?
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20 or more
efferent neurons
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Nerve cells that conduct impulses away from the central nervous system
dendritic spines
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specialized protrusions from the dendritic shaft that enable an increase in
the number of possible contact sites between a neuron and its
neighbouring cells. Many contain polyribosomes and can synthesize their
own proteins
Membrane potential of a neuron is a direct result of:
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uneven distribution of ions across the membrane and different membrane
permeability of these ions
channel inactivation
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channel closing even when activation stimulus continues
graded potentials
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the events of depolarization or hyperpolarization that normally occur in
the dendrites and soma
biogenic amines neurotransmitter
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formed when the carboxyl group in amino acids are removed. eg.
norepinephrine, epinephrine, dopamine, and serotonin. Mostly affect CNS.
Excitatory or inhibitory.
, morphology of dendritic spines
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shape and size constantly change and are associated with learning and
memory
Broca's area
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located in the frontal lobe close to the motor cortex. Damage to this area
causes individuals to be unable to speak or write in normal syntax. They are
aware of their mistakes, but powerless to correct them. They are able to
understand verbal or visual information.
unipolar neuron
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one process projected from the cell body
Which biogenic amines are catecholamines?
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the act of splitting off into different directions
The nervous system can distinguish between a light touch and a heavier touch for a
given duration of stimulus because:
a) weak stimulus generates a weaker action potential
b) frequency of impulses generated is lower for lighter
touch
c) threshold to generate an action potential is lower for
lighter touch
d) the length of the refractory period is modified
Give this one a try later!
, b) frequency of impulses generated is lower for lighter
touch
How many postganglionic fibers can preganglionic fibers synapse with in the SNS?
Give this one a try later!
20 or more
efferent neurons
Give this one a try later!
Nerve cells that conduct impulses away from the central nervous system
dendritic spines
Give this one a try later!
specialized protrusions from the dendritic shaft that enable an increase in
the number of possible contact sites between a neuron and its
neighbouring cells. Many contain polyribosomes and can synthesize their
own proteins
Membrane potential of a neuron is a direct result of:
,Give this one a try later!
uneven distribution of ions across the membrane and different membrane
permeability of these ions
channel inactivation
Give this one a try later!
channel closing even when activation stimulus continues
graded potentials
Give this one a try later!
the events of depolarization or hyperpolarization that normally occur in
the dendrites and soma
biogenic amines neurotransmitter
Give this one a try later!
formed when the carboxyl group in amino acids are removed. eg.
norepinephrine, epinephrine, dopamine, and serotonin. Mostly affect CNS.
Excitatory or inhibitory.
, morphology of dendritic spines
Give this one a try later!
shape and size constantly change and are associated with learning and
memory
Broca's area
Give this one a try later!
located in the frontal lobe close to the motor cortex. Damage to this area
causes individuals to be unable to speak or write in normal syntax. They are
aware of their mistakes, but powerless to correct them. They are able to
understand verbal or visual information.
unipolar neuron
Give this one a try later!
one process projected from the cell body
Which biogenic amines are catecholamines?
Give this one a try later!
