Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Remove Ads
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards




share
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

BIO201-CH14-A.N.SYS

BIO201 - Ch 14 - Autonomic Nervous System - Marieb/Hoehn - Rio Salado - AZ

QuestionAnswer
Autonomic Nervous System (ANS) System of motor neurons that innervates smooth & cardiac muscles & glands.
Sample of activities conducted by ANS Shunts blood to "needy" areas, slows or speeds heart rate, adjusts blood pressure & body temp, increases/decreases stomach secretions.
Major difference between somatic & autonomic NS. (1) Their effectors, (2) efferent pathways, & (3) target organ responses to their neurotransmitters.
Somatic NS stimulates __ muscles, where the ANS innervates __ muscles. Skeletal, Cardiac/smooth/glands
Parasympathetic Nerves Of the ANS - tends to slow body down & divert energy to basic tasks - works in opposition to sympathetic.
Sympathetic Nerve OF ANS - nerves that increase overall body activities when heightened - excitement/danger, "fight-or-flight".
Meninges Membranes of CT layered between skull & brain - cover & protect CNS neurons & blood vessels.
In somatic NS, motor neuron cellbodies are in __ & axons extend in __ nerves. CNS, Spinal or cranial nerves
Somatic motor fibers are typically __. Thick, group A - conduct impulses rapidly.
ANS uses a __ to its effectors. 2 neuron chain
In ANS, the cell body of 1st neuron is the __. Preganglionic neuron
The preganglionic neuron resides __. In the brain or spinal cord
The axon of the first neuron is the __. Preganglionic axon
The preganglionic axon synapses with __. The 2nd motor neuron, or ganglionic neuron.
The axon of the 2nd motor neuron is __. The ganglionic axon
The ganglionic axon extends to __. The effector organ
Preganglionic axons are lightly __ & post-ganglionic axons are __. Myelinated (thin), unmyelinated (even thinner).
Conduction through autonomic efferent chain is __ than somatic motor system. Slower
For most of their course, many pre- & post-ganglionic fibers are incorporated into __. Spinal & cranial nerves
Autonomic ganglia are __ & contain cell bodies of __. Motor ganglia, motor neurons
The somatic motor division __ ganglia. Lacks
The dorsal root ganglia are part of the __. Sensory (not motor) division of the PNS.
All somatic motor neurons release __ @ synapses. Acetylcholine (ACh)
The effect of somatic motor neurons is always __. Excitatory - to cause contraction.
Postganglionic autonomic fibers release __ & __. Norepinephrine (NE) & acetylcholine (ACh).
In ANS, norepinephrine (NE) is secreted by __. Most sympathetic fibers.
In ANS, ACh is released by __. Parasympathetic fibers.
Somatic & autonomic motor activities regulated by __. Higer brain centers.
Nearly all spinal & many cranial nerves contain __. Both somatic & autonomic fibers.
Two divisions of ANS are? Parasympathetic & sympathetic.
Though __ the 2 ANS divisions counterbalance each other's activities. Dual innervation
The parasympathetic division is sometimes called __. The resting & digesting system - keeps body energy use low - housekeeping.
Good visual to remember parasympathetic division. Person relaxing after a meal & reading newspaper - blood pressure/heart rate low, digesting meal & pupils constricted to read.
Sympathetic division often referred to as __. "Flight-or-fight" system - excited, threatened.
Changes in brain wave patterns & galvanic skin resistance due to __ when lying. Sympathetic
Parasympathetic fibers emerge from __. The brain & sacral spinal cord (craniosacral)
Sympathetic fibers originate in the __. Thoracolumbar region of spinal cord.
Parasympathetic division has __ preganglionic & __ postganglionic fibers. Long, short
Sympathetic division has __ preganglionic & __ post ganglionic fibers. Short, long
Most parasympathetic ganglia are located __. In the visceral effector organs.
Most sympathetic ganglia lie __. Close to the spinal cord.
All preganglionic fibers release __. ACh
All parasympathetic postganglionic fibers release __. Acetylcholine
Most sympathetic post ganglionic fibers release __. Norepinephrine
Stimulated adrenal medullary cells release __ into the blood. Norepinephrine & epinephrine
Which division of NAS is called the craniosacral division? Parasympathetic
Terminal ganglia are located where? Close to or within target organs.
Through which 4 cranial nerves do preganglionic fibers run? Oculomotor (III), facial (VII), Glossopharyngeal (IX), & Vagus (X)
The cell bodies are in the __ within eye orbits. Ciliary ganglion
Preganglionic fibers in facial nerve (VII) synapse where? Pterygopalatine ganglia - near maxillae.
Salivary glands - parasympathetic fibers synapse where? Mandibular ganglia
Partoid gland & glossopharyngeal IX - synapse where? Otic ganglia - near ears
Postganglionic fibers of parasympathetic __ lie in cranial nerves. Do not
The __ nerves have broadest facial distribution of all cranial nerves & useful for glands & smooth muscle stimulation of parasympathetic. Trigeminal nerves V
Vagal nerve fibers account for 90% of preganglionic fibers in body & arise from __. Medulla
Vagus nerves in thorax brach to which 4 plexuses? Cardiac, pulmonary, esophageal, & aortic plexuses.
Sacral outflow of parasympathetic arise from? S2-S4 form pelvicsplanchnic Nerves
Which division of ANS is more complex? Sympathetic Division
Sympathetic division also called __. Thoracolumbar
Which ANS division innervates more organs? Sympathetic - visceral organs & structures.
Arrector pili, sweat glands, arteries, & veins innervated by which ANS division? Sympathetic - smooth muscles in each.
Allpreganglionoic sympathetic fibers arise from cell bodies where? In spinal cord segments T1-L2 (thoracolumbar division)
What produces the lateral horns? Numerous preganglionic sympathetic neurons in the gray matter of spinal cord.
What are the visceral motor zones? Lateral horns
Ventral horns house __ neurons. Somatic motor neurons
Lateral horns are absent where? In the sacral region of spinal cord.
Path of sympathetic fiber after ventral root. Ventral root =>white ramus communicans=>sympathetic trunk (chain) ganglion
Sympathetic trunks flank each side of what? The vertebral column (paravertebral ganglia)
There are __ ganglia in each sympathetic trunk. 23 - 3c, 11T, 4L, 4S, 1C
Splanchnic nerves synapse in __ ganglia located anterior to vertebral column. Collateral (prevertebral) - occur only in abdomen & pelvis.
Celiac,superior & inferior mesenteric ganglia are __. Collateral (prevertebral) ganglia
The color of gray & white Rami communicantes are due to? Myelination
Rami communicantes are associated only with the __ division. Sympathetic - parasympathetic doesn't run in spinal nerves.
Sympathetic preganglionic fibers serving head ascend the __ to synapse with __. Sympathetic trunk, superior cervical ganglion
Superior cervical ganglion sends direct branches to __. The heart
Sympathetic fibers __ activity of large intestine, bladder, & reproductive organs. Inhibit
A visceral reflex arc has __. 2 Neurons in its motor component.
Where are cell bodies of visceral sensory neurons? Sensory ganglia of associated cranial nerves or in dorsal root ganglia of spinal cord.
3 neuron reflex arcs occur where? In walls of gastrointestional tract
Why is there referred pain? Visceral pain afferents travel same pathways as somatic pain fibers.
ACh-releasing fibers are called __ fibers. Cholinergic
Norepinephrine (NE) - releasing fibers are called __ fibers. Adrenergic
All ACh receptors are __ or __. Nicotinic or muscarinic
ACh binding to nicotinic receptors is always __. Stimulatory
Knowing locations of cholinergic & adrenergic receptors allows __. Proper prescription of drugs.
Most glands (except adrenal & sweat) are activated by __ fibers. Parasympathetic
Most blood vessels receive only __ fibers. Sympathetic
The effects produced by sympathetic activation are __. Longer lasting
The __ is the integrator of ANS activity. Hypothalamus
Though hypothalamus is boss, the __ exerts most direct influence over autonomic functions. Brainstem - reticular formation.
Raynaud's Disease Skin of fingers & toes turn blue & apinful when cold or emotionally distressed.
Autonomic Dyreflexia Uncontrolled activation of autonomic neurons - occurs in quadriplegia or spinal injury above T6 - in 1st year after injury - triggered by pain or overfilled bladder - Blood pressure increase - can stroke.
Created by: Ladystorm