Preganglionic neurons of the autonomic nervous system are located
in
the brain.
the lateral gray horns of the spinal cord.
the posterior gray horns of the spinal cord.
both the brain and the lateral grey horns of the spinal cord
both the brain and the posterior gray horns of the spinal cord
both the brain and the lateral grey horns of the spinal cord
Norepinephrine and epinephrine enter the bloodstream when
sympathetic
stimulation is provided to the:
adrenal medulla
liver
brain
heart
kidneys
adrenal medulla
Drugs that have effects similar to those of norepinephrine and
epinephrine
are called sympathomime!c drugs. Which of the
following symptoms would
you NOT expect to observe in a person
who has taken an excess of
sympathomimetic drugs?
sweating
dilation of the pupil
rapid respiration
decreased blood pressure
Decrease digestive activity
decreased blood pressure
Post-ganglionic sympathetic fibers release the neurotransmitter
_______________.
acetylcholine
norepinephrine
GABA
serotonin
dopamine
norepinephrine
Terminal ganglia are part of the:
sympathetic system
parasympathetic system
parasympathetic system
Parasympathetic functions include all of the following, except
stimulation of urination.
constriction of the pupils.
stimulation of defecation.
decrease in the rate of cardiac contraction.
dilation of the airways.
dilation of the airways.
Most of the parasympathetic fibers come from the:
sciatic nerve
glossopharengeal nerve
sacral region
vagus nerve
accessory nerve
vagus nerve
Dilation of the pupils is a __________________________ response
sympathetic
parasympathetic
sympathetic
The parasympathe!c nervous system arises from the ______________
area(s)
of the spinal cord.
cranial
lumbar
thoracic and lumbar
cranial and sacral
caudal
cranial and sacral
Parasympathe!c s!mula!on to the liver, stomach, and gall bladder
is
provided by fibers traveling with the:
white ramus
gray ramus
greater splanchnic nerve
vagus nerve
lesser splanchnic nerve
vagus nerve
The white ramus consists of:
pre-ganglionic parasympathetic fibers
post-ganglionic parasympathetic fibers
pre-ganglionic sympathetic fibers
post-ganglionic sympathetic fibers
pre-ganglionic sympathetic fibers
The first of two motor neurons in any autonomic pathway is called
premotor neuron
preganglionic neuron
postmotor neuron
postganglionic neuron
all answers are correct
preganglionic neuron
Splanchnic nerves:
innervate the diaphram
run from the chain ganglia to the collateral ganglia
control the sweat glands
are sacral parasympathetic nerves
go directly to the spleen
run from the chain ganglia to the collateral ganglia
Muscarinic receptors
are found mostly in autonomic ganglia.
control sodium channels in the affected membrane.
are blocked by norepinephrine.
are normally activated by acetylcholine.
always produce an excitatory response.
are normally activated by acetylcholine.
The ________ division of the autonomic nervous system is said to
function
during "rest and digest."
parasympathetic
somatomotor
visceral
thoracolumbar
sympathetic
parasympathetic
During sympathetic activation, ________ occurs.
elevated blood glucose
sweating
elevated heart rate
elevated blood pressure
all of the above
all of the above
Nicotinic receptors
respond to epinephrine.
respond to norepinephrine.
are found at neuroeffector junctions of the parasympathetic nervous system.
open chemically gated sodium ion channels.
open chemically gated calcium ion channels.
open chemically gated sodium ion channels.
Which of the following statements concerning the parasympathetic
division
of the autonomic nervous system is false?
The ganglionic neurons always release acetylcholine.
Preganglionic neurons are located in the brain stem and sacral
region of the spinal
cord.
Preganglionic fibers are relatively short and postganglionic fibers
are relatively
long.
Ganglionic neurons are located in ganglia within or near to effectors.
The actions of the parasympathetic division are more localized than
those of the
sympathetic division.
Preganglionic fibers are relatively short and postganglionic fibers
are relatively
long.
To say that most organs innervated by the ANS have 'dual
innervation'
means that:
these organs release either acetylcholine or norepinephrine when stimulated.
it take two postganglionic neurons to achieve the desired result.
the organs are innervated by both sympathetic and parasympathetic neurons.
the organs have both alpha and beta receptors.
both a pregangionic and a postganglionic neuron go to the organ.
the organs are innervated by both sympathetic and parasympathetic neurons.
Pre-ganglionic parasympathetic fibers release the neurotransmitter
_____________.
acetylcholine
norepinephrine
GABA
serotonin
dopamine
acetylcholine