The Nervous System IV: The Autonomic Division of the Nervous System
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
---|---|---|---|---|---|
The ANS is the | general visceral motor division of the PNS
🗑
|
||||
The ANS is the system of | motor neurons that innervates smooth muscle, cardiac muscle and glands
🗑
|
||||
the ANS regulates...and coordinates... | body temp...cardiovascular, respiratory, digestive, excretory and reproductive functions
🗑
|
||||
fundamentally, the ANS operates at the | subconscious level to accomplish routine physiological modifications to the organ systems
🗑
|
||||
the ANS performs processes that maintain | homeostasis
🗑
|
||||
the ANS and SNS have | afferent and efferent neurons
🗑
|
||||
the ANS and SNS differ in | receptor and effector organ location
🗑
|
||||
in the somatic motor division of the nervous system, a single | lower motor neuron forms the pathway from the CNS to contact and exert direct control over skeletal muscles
🗑
|
||||
in the ANS, | afferent pathways originate in visceral receptors, and efferent pathways connect to visceral effector organs
🗑
|
||||
the ANS and SNS also differ in the | arrangement of the neurons connecting the CNS to the effector organs
🗑
|
||||
autonomic motor pathways consist of | chains of two neurons
🗑
|
||||
the PREganglionic neuron | a visceral motor neuron whose cell body is in the CNS
🗑
|
||||
the preganglionic neuron sends its axons, called...to... | preganglionic fibers..synapse on the ganglionic neuron
🗑
|
||||
the ganglionic neuron is a nueron whose cell body is in an | autonomic ganglion which sends its axons, called POSTganglionic fibers to peripheral tissues and organs such as cardiac and smooth muscles, adipose tissue and glands
🗑
|
||||
the postganglionic fibers of ganglionic neurons carry impulses | away from the ganglion
🗑
|
||||
the postganglionic fibers cell bodies are | within ganglia
🗑
|
||||
the ANS has | parasympathetic and sympathetic divisions
🗑
|
||||
the parasympathetic and sympathetic divisions both innervate many of the | same organs but produce opposite effects
🗑
|
||||
the parasympathetic division is active during the | rest and digest mode
🗑
|
||||
the parasympathetic division is | craniosacral and has comparatively long preganglionic axons
🗑
|
||||
the long preganglionic axons of the parasympathetic divions synapse on | neurons of terminal ganglia or neurons of intramural ganglia
🗑
|
||||
the sympathetic division prepares the body for the | fight or flight mode
🗑
|
||||
the sympathetic division is | thoracolumbar and has compararitevly long postganglionic axons
🗑
|
||||
the two divisions differ in the ...they release at the... | neurotransmitter...effector organ
🗑
|
||||
all preganglionic terminals release | ACh and are stimulatory
🗑
|
||||
plasmalemma receptors in the preganglionic terminals determine | whether the response will be stimulatory or inhibitory
🗑
|
||||
acetylcholine is released by | all parasympathetic postganglionic fibers and may be stimulatory or inhibitory
🗑
|
||||
norepinephrine is released by | most sympathetic postganglionic fibers, effects are usually stimulatory
🗑
|
||||
the parasympathetic division consists of | preganglionic neurons in the brain stem and in the lateral portion of the anterior gray horns of S2-S4
🗑
|
||||
the preganglionic neuron's fibers leave the brain in | CN III, VII, IX and X
🗑
|
||||
preganglionic fibers in ... of the parasympathetic division innervate...and they synapse in the | CN III, VII, and IX...visceral structures in the head ... ciliary, pterygopalatine, submandibular, and otic ganglia
🗑
|
||||
short postganglionic fibers of the parasympathetic division then connect to their | peripheral target organs or tissues
🗑
|
||||
preganglionic fibers in ...of the parasympathetic division synapse in... | CN X...intramural ganglia within structures in the thoracic cavity and in the abdominopelvic cavity
🗑
|
||||
the vagus nerve provides roughly | 75% of all parasympathetic outflow
🗑
|
||||
the sacral outflow | does NOT join the ventral rami of the spinal nerves in the parasympathetic division
🗑
|
||||
the preganglionic fibers of the sacral outflow of the parasympathetic division form | distinct pelvic nerves
🗑
|
||||
the distinct pelvic nerves innervate | intramural ganglia in the kidney and urinary bladder, the terminal portions of the large intestine and the sex organs
🗑
|
||||
preganglionic fibers of the parasympathetic division release | ACh and stimulate ganglionic neurons
🗑
|
||||
all postganglionic fibers of the parasympathetic division release | ACh at neuroeffector junctions
🗑
|
||||
major parasympathetic effects center on | relaxation, food processing, and energy absorption
🗑
|
||||
general functions of the parasympathetic division include | pupil restriction, hormone secretion for nutrient absorption, increased digestive tract activity, defecation activities
🗑
|
||||
general functions of the parasympathetic division also includes | urinary bladder contraction, respiratory passageway constriction, decreased heart rate and sexual arousal
🗑
|
||||
the parasympathetic division performs...including the | digestive gland secretion....salivary glands, gastric glands, duodenal and other intestinal glands, the pancreas and the liver
🗑
|
||||
all parasympathetic neurons are | cholinergic
🗑
|
||||
all parasympathetic preganglionic and postganglionic fibers release | ACh at synapses and neuroeffector junctions
🗑
|
||||
effects of neurotransmitter release in the parasympathetic division are | short lived bec of the actions of enzymes at the postsynaptic plasmalemma and in the usrrounding tissues
🗑
|
||||
two different types of ACh receptors in the postsynaptic plasmalemmae of the parasympathetic division include | nicotinic and muscarinic
🗑
|
||||
nicotinic receptors are located on | ganglionic cells of both division of the ANS and at neuromuscular synapses
🗑
|
||||
exposre to ACh causes nicotinic | excitation by opening plasmalemmae channels
🗑
|
||||
muscarinic receptors are located at | neuroeffector junctions in the parasympathetic division and those cholinergic neuroeffector junctions in the sympathetic division
🗑
|
||||
stiumulation of muscarinic receptors produces a | longer-lasting effect than does stimulation of nicotinic receptors
🗑
|
||||
cranial parasympathetic fibers arise in the | brain stem of CN III, VII, IX, AND X
🗑
|
||||
cranial parasympathetic fibers synapse in | ganglia in the head, thorax, and abdomen
🗑
|
||||
cranial outflow fibers in CN VII serve the | submandibular, sublingual, lacrimal, and nasal glands
🗑
|
||||
fibers in CN VII synapse in the | submandibular and pterygopalatine ganglia
🗑
|
||||
cranial outflow fibers in CN IX serve the | parotid gland and synapse in the otic ganglion
🗑
|
||||
parasympathetic fibers in the vagus nerve innervate | organs in the thorax and most of the abdomen, including the heart, lungs, esophagus, stomach, liver and most of the intestines
🗑
|
||||
fibers in the vagus nerve of cranial outflow are | preganglionic
🗑
|
||||
almost all ganglionic neurons of cranial outflow are located in | intramural ganglia within the organ walls
🗑
|
||||
sacral outflow; sacral parasympathetic pathways innervate | the pelvic viscera
🗑
|
||||
the preganglionic fibers of sacral outflow exit from the | visceral motor region of the gray matter of the spinal cord
🗑
|
||||
preganglionic fibers of the sacral outflow form the | pelvic splanchnic nerves
🗑
|
||||
most of these fibers (sacral outflow) synapse in | intramural ganglia in the kidney, bladder, latter portions of the large intestine and sex organs
🗑
|
||||
visceral motor nuclei of the parasympathetic division are associated with | CN III, VII, IX, AND X and with sacral segments S2-S4
🗑
|
||||
ganglionic neurons of parasympathetic division are located in | terminal or intramural ganglia near or within target organs
🗑
|
||||
parasympathetic fibers innervate | areas controlled by cranial nerves and organs in the thoracic and abdominopelvic cavities
🗑
|
||||
all parasympathetic neurons are | cholingeric
🗑
|
||||
parasympathetic effects are usually | short-lived and restricted to specific target areas
🗑
|
||||
the sympathetic division consits of | preganglionic neurons between T1 and L2
🗑
|
||||
sympathetic division consists of ganglionic neurons in | sympathetic chain ganglia and collateral ganglia
🗑
|
||||
chain ganglia innervate | effectors in the body wall, head and neck, limbs, and inside the thoracic cavity
🗑
|
||||
collateral ganglia innervate | effectors in the abdominopelvic cavity
🗑
|
||||
sympathetic division has | specialized neurons within the suprarenal glands
🗑
|
||||
the preganglionic sympathetic cell bodies of the sympathetic division are in the | lateral horn of the spinal gray matter from the level of T1 to L2
🗑
|
||||
the sympathetic division supplies some | peripheral structures that the parasympathetic division doesn't
🗑
|
||||
peripheral structures supplied by the sympathetic division include | arrector pili, sweat glands, and the smooth muscle of blood vessels
🗑
|
||||
sympathetic ganglia include...pairs of... | 22-24...sympathetic trunk ganglia and one unpaired collateral ganglia
🗑
|
||||
trunk ganglia are also called | chain ganglia and paravertebral ganglia
🗑
|
||||
trunk ganglia are linked together to form | sympathetic trunks on both sides of the vertebral column
🗑
|
||||
collateral ganglia are also called | prevertebral ganglia
🗑
|
||||
collateral ganglia lie on the | aorta in the abdomen, located anterior to the vertebral column
🗑
|
||||
preganglionic fibers of the sympathetic division are...and release...and stimulate... | cholinergic...ACh (excitatory)...ganglionic neurons
🗑
|
||||
most postganglionic fibers of the sympathetic division release | NE at neuroeffector junctions, causing a fight or flight response
🗑
|
||||
sympathetic chain ganglia; every preganglionic sympathetic fiber leaves the | lateral gray horn of the thoracolumbar spinal cord through a ventral root and spinal nerve
🗑
|
||||
from there, sympathetic preganglionic fiber run in a | white ramus communicans (myelinated) to a sympathetic trunk ganglion or collateral ganglion
🗑
|
||||
preganglionic sympathetic fibers synapse with the | ganglionic neuron that extends to the visceral effector
🗑
|
||||
many preganglionic axons ascend or descend in the | sympathetic trunk to synapse in a ganglion at another body level
🗑
|
||||
in each sympathetic chain, there are | 3 cervical, 11-12 thoracic, 2-5 lumbar and 4-5 sacral ganglia and 1 coccygeal sympathetic ganglion
🗑
|
||||
every spinal nerve of the sympathetic division has a | gray ramus that carries sympathetic postganglionic fibers
🗑
|
||||
only thoracic and superior lumbar ganglia of the sympathetic division recieve | preganglionic fibers via white rami
🗑
|
||||
the cervical, inferior lumbar, and sacral chain ganglia of sympathetic division receive | preganglionic innervation from collateral fibers of sympathetic division
🗑
|
||||
every spinal nerve of the sympathetic division receives a | gray ramus from a ganglion of the sympathetic chain
🗑
|
||||
in the sympathetic pathway to the body periphery the preganglionic fibers synapse in the...and the postganglionic fibers run in...to the... | sympathetic trunk ganglia...gray rami communicantes...dorsal and ventral rami of the spinal nerves for peripheral distribution
🗑
|
||||
in the sympathetic pathway to the head preganglionic fibers synapse in the... | superior cervical ganglion
🗑
|
||||
sympathetic pathway to the head; from there, most | postganglionic fibers associated with a large artery that distributes them to the glands and smooth musculature of the head
🗑
|
||||
in the sympathetic pathway to thoracic organs most preganglionic fibers synapse in the...and the postganglionic fibers run | nearest s sympathetic trunk ganglion...directly to the organs (lungs and esophagus)
🗑
|
||||
many post ganglionic fibers of the sympathetic division go to the...however..descend from the... | heart...cervical ganglia in the neck
🗑
|
||||
in the sympathetic pathway to the abdominal organs, preganglionic fibers run in...to synapse in | splanchnic nerves (greater, lesser, lumbar, and sacral) ...collateral ganglia on the aorta
🗑
|
||||
from these ganglia(preganglionic fibers of collateral ganglia), the postganglionic fibers follow | large arteries to the abdominal viscera (stomach, liver, kidney, and most of the large intestine
🗑
|
||||
in the sympathetic pathway to pelvic organs, the preganglionic fibers synapse in | sympathetic trunk ganglia or in collateral ganglia on the aorta, sacrum, and pelvic floor
🗑
|
||||
postganglionic fibers of collateral ganglia travel through the | most inferior autonomic plexuses to the pelvic organs
🗑
|
||||
the splanchnic nerves of the sympathetic division innervate the | hypogastric plexus and three collateral ganglia
🗑
|
||||
the celiac ganglion of the splanchnic nerves innervate | the stomach, liver, pancreas, and spleen
🗑
|
||||
the superior mesenteric ganglion of the splechnic nerves innervate the | small intestine and initial segments of the large intestine
🗑
|
||||
the inferior mesenteric ganglion of the splechnic nerves innervate the | kidney, bladder, sex organs and terminal segments of the large intestine
🗑
|
||||
the adrenal glands of the adrenal medulla in the sympathetic division individually located | superior to each kidney
🗑
|
||||
the adrenal glands contain a | medulla of modified post ganglionic sympathetic neurons
🗑
|
||||
medulla of postganglionic sympathetic neurons secrete the | hormones epinephrine and norepinephrine into the blood
🗑
|
||||
adrenal medulla secretions result in teh | surge of adrenaline felt during excitement
🗑
|
||||
some preganglionic fibers of the adrenal medulla | do NOT synapse as they pass through both the sympathetic chain ganglia and collateral ganglia
🗑
|
||||
the preganglionic fibers of the adrenal medulla that don't synapse enter | one of the suprarenal glands instead and synapse on modified neurons within the suprarenal medulla
🗑
|
||||
the cells of the adrenal medulla are innervated by | preganglionic sympathetic neurons
🗑
|
||||
preganglionic sympathetic fibers of adrenal medulla signal the secretion of the hormones | epinephrine and norepinephrine into the ciruculation which causes prolonged sympathetic innervation effect
🗑
|
||||
there are 2 classes of sympathetic receptors which are stimulated by NE and E are | alpha receptors and beta receptors
🗑
|
||||
alpha receptors respond to | stimulation by depolarizing the plasmalemma
🗑
|
||||
beta receptors respond to | stimulation by changing the metabolic activity of the cells
🗑
|
||||
most postganglionic fibers of the sympathetic division are | adrenergic (release NE) but a few are cholinergic
🗑
|
||||
postganglionic fibers of sympathetic division innervate | sweat glands of the skin and blood vessels to skeletal muscles are cholinergic
🗑
|
||||
the sympathetic division consists of ...segmentally arranged...that lie...to the vertebral column | 2...sympathetic chains...lateral
🗑
|
||||
the sympathetic division also contains...that lie..to the vertebral column | 3 collateral ganglia..anterior
🗑
|
||||
lastly, the sympathetic division contains | 2 suprarenal medullae
🗑
|
||||
preganglionic fibers of sympathetic division are relatively | short except for those of the suprarenal medulla
🗑
|
||||
postganglionic fibers of the sympathetic division are quite | long
🗑
|
||||
...typically occurs in the sympathetic division | extensive divergence
🗑
|
||||
a single preganglionic fiber of the sympathetic divison synapses with | many ganglionic neurons in different ganglia
🗑
|
||||
all preganglionic fibers of the sympathetic division are | cholinergic
🗑
|
||||
most postganglionic fibers of the sympathetic division are | adrenergic
🗑
|
||||
effetor response of the sympathetic division depends on the | nature and activity of the receptor
🗑
|
||||
in a crisis...occurs, in which the... | sympathetic activation...entire sympathetic divison responds
🗑
|
||||
the effects of the sympathetic division include | increased alertness, a feeling of energy and euphoria, increased cardio and respiratory activity, general elevation in muscle tone and mobilization of energy reserves
🗑
|
||||
organs with dual innervation receive | insrtuctions from both the parasympathetic and sympathetic division of the ANS
🗑
|
||||
nerves from both division | intermingle to form nerve plexuses
🗑
|
||||
dual innervation plexuses include | cardiac, pulmonary, esophageal, celiac, inferior mesenteric and hypogastric
🗑
|
||||
visceral motor functions of the ANS are influenced by the | medulla oblongata, periaqueductal gray matter, spinal visceral reflexes, hypothalamus and amygdala and cerebral cortex
🗑
|
||||
visceral reflexes of ANS are the...and provide...that can be..by... | simplest functions of the ANS...automatic motor responses...modified, facilitated, or inhibited...higer centers, especially in the hypothalamus
🗑
|
||||
higher brain centers in the posterior and lateral hypthalamus are involved in | coordination and regulation of sympathetic division
🗑
|
||||
portions of the anterior and medial hypothalamus are involved in | the control of parasympathetic functioning
🗑
|
||||
some people can voluntarily regulate some | autonomic activities by gaining extraordinary control over their emotions
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
handrzej
Popular Anatomy sets