Anatomy Autonomic Nervous Sys

Front 1

Part of the nervous system concerned with the innervaton of involuntary structures; cardiac muscles, smooth muscle (organs blood vessels, glands

Back 1

autonomic nervous system

Front 2

ANS has ___ neurons required to transmit a nerve impluls from the CNS to an effector organ

Back 2

two
Preganglionic and postganglionic

Front 3

Somatic nervous system requires ___ neurons to transmit a nerve impulse

Back 3

one

Front 4

Preganglionic motor cell bodies of the
ANS are location in the ___ and ___

Back 4

Brain & spinal cord

Front 5

In the spinal cord motor fibers exit the spinal cord with somatic motor fibers in the

Back 5

ventral roots

Front 6

sensory fibers of the ANS have cell bodies with the ___ similar to somatic sensory

Back 6

Dorsal root ganglion

Front 7

The ANS can be divided into the ___ & _____ systems

Back 7

parasympathetic and sympathetic

Front 8

The function of the sympathetic is ____

Back 8

fight or flight
inc HR, bp, redistribute bld away from skin & intestine to brain, heart, skeletal muscle, inhibit perastalisis (close sphincters

Front 9

Preganglion fibers are ___ fibers and post are ___ fibers in the SNS

Back 9

pre are short
post are long
except in the splanchnic nerves

Front 10

Preganglion use ____as a neurotransmitter

Back 10

acetylcholine

Front 11

postganglion use ___ as a neurotransmitter

Back 11

norepinepherine

Front 12

Cell bodies of pregang motor fibers are located in _____ of the lateral horn at ____(thoracolumbar) spinal cord levels

Back 12

intermediolateral cell column
T1-L2

Front 13

SNS motor fibers accompany somatic motor fibers through the ventral roots at these levels

Back 13

T1-L2
there are no sns motor fibers exiting the spinal cord in the cervical, lower lumbar or sacral

Front 14

Ventral & dorsal roots converge to form the ___

Back 14

spinal nerve

Front 15

Preganglionic motor fibers of SNS leave the spinal nerve as ______ramus commuicans

Back 15

white (myelinated) enter the vertically oriented sympathetic trunk paravertebrally (along vertebrae)

Front 16

Sympathetic trunks are paired & consist of a series of ganglia (contain post gang motor cell bodies)connected by axon-intervening fibers give appearance of a string of beads

Back 16

sympathetic trunks

Front 17

Contributions to the sympathetic trunk only come from ___ & ___ spinal cord segments

Back 17

thoracic & lumbar spinal cord

Front 18

The sympathetic trunk extends superiorly to the ___ vertebra and inferior to the ____

Back 18

C1 and pelvis

Front 19

Preganglionic motor fibers enter white rami may ____ with post gang in the sympathetic gang at the same level

Back 19

synapse

Front 20

Pre gang may course ____ or ______ several segments w/in the sympathetic trunk before synapsing w/ post gang

Back 20

superiorly or inferiorly

Front 21

Pre gang may travel through and exit the sympathetic trunk without synapsing and form ____ branches known as splanchinic (visera)(pregang motor) nerves

Back 21

viscral branches

Front 22

Post gang axons are

Back 22

unmyelinated

Front 23

post gang fibers from sympathetic trunk join the spinal nerves via

Back 23

gray ramus communicans (gray = unmyelinated)

Front 24

Spinal nerves at all vertebral levels recv' at least one ___ramus communicans (all contain a sympathetic comp)

Back 24

gray

Front 25

Splanchnic nerves contain primarily ______motor and

Back 25

pregang and sensory fibers

Front 26

Post gang neurons for splanchnic are not locatic in the ____ but in periperal ganglia close to the viscera they will innervate (stomach)

Back 26

pregang

Front 27

In the PNS (periph) pregang are ___ and postgang are ___

Back 27

pregang = long
postgang = short

Front 28

The largest pregang is located in the ____ and recv splanchnic nerves from the thoracic region

Back 28

abdomen

Front 29

Ganglia are located next to the the abd aorta ant to the ventral bodies are termed

Back 29

prevertebral ganglia

Front 30

originate from cell bodies of the ganglia distribute to viscera by following blood vessels

Back 30

Postgang fibers

Front 31

Sensory fibes accompany SNS motor comp in splanchnic nerves. Sensory fibers have cell bodies located in the

Back 31

dorsal root ganglion(sim to afferent fibers ) use dorsal roots and white rami communicantes for periph distribution

Front 32

Parasym (carniosacral) function of this division is to establish homeostasis PNS act to

Back 32

slow HR, inc intestinal perastalsis, gland activity open sphincters

Front 33

PNS do not distribute to the ___ and ___ , limited to the structures in the head, thoracic, abd, pelvis viscera and genitals

Back 33

limbs or body wall

Front 34

Pregang efferent fibers are ___ and postgang are ___ in the PNS

Back 34

long and short

Front 35

Both pregang & postgang fibers use ___ as a neurotransmitter

Back 35

ACh

Front 36

Structures of Parasym ANS
Cell bodies of pregang are located either in assoc w/ specific nuclei of cranial nerves

Back 36

III, VII, IX & X or in the intermediolateral cell column at spinal cord levels (S2,3,4)

Front 37

Axons from the cranial protion of the PNS travel w/ corres cranial nerve and synapse in specific

Back 37

cranial Parasymp ganglia

Front 38

____postgang fibers from these gang travel to the vescera to be innervated

Back 38

Unmyelinated

Front 39

Axons from the sacral portion of the parasymp exit the cord ventrally along w/ somatic motor fibers in the ventral roots of ___

Back 39

spinal nerves

Front 40

Myelinated pregang axons usually leave the spinal nerve w/ which they are assoc immediately after the spinal nerve exis the vertebral column and are termed

Back 40

pelvic splanchnic nerves

Front 41

Post gang neurons are located in ganglia that are widely scattered and irreg space throughout the ___ and ___

Back 41

trunk & head

Front 42

Post gang are located very ___ to organs that they innervate or even within the walls of the organ

Back 42

close

Front 43

Pregang motor fibers are ___ & post gang are __ in the SNS

Back 43

shot & long

Front 44

In the PNS the pregang is ___ and the post gang is ____

Back 44

long & short

Front 45

fibers ascending and descending bet ganglia of the sympathetic trunk are primarily

Back 45

pregang

Front 46

___ Rami are only found assoc w/ ___spinal nerves and contain pregang motor & sensory fibers

Back 46

white

Front 47

___rami communicantes contain post gang motor fibers

Back 47

gray

Front 48

contain primarily pregang motor and sensory fibers

Back 48

Splanchnic nerves

Front 49

PNS has nothing to do with the viseral, limbs only goes to the

Back 49

organs