Chapter 15 - The Autonomic Nervous System and Visceral Reflexes

40 cards

Chapter 15 - The Auto


 
  
Created Dec 5, 2010
by
cutebutevil7

 

 
Table View
 
Download
 
Print

Flashcard Set Preview

  Side A   Side B
1
A motor nervous system that controls glands, cardiac and smooth muscle to maintain homeostasis,...
 
ANS - Autonomic
2
Slower than somatic reflexes, include a visceral reflex arc, Example Elevated BP; baroreceptors...
 
Visceral Reflexes
3
(receptor, afferent neurons, interneurons, efferent neurons, effectors),
 
Visceral reflex arc
4
Mainly adapts body for activity, (“fight or flight”)
 
Sympathetic
5
Mainly a calming effect, reduced energy expenditure, normal body maintenance (“rest &...
 
Parasympathetic
6
Background rate of activity from both divisions
 
Autonomic Tone
7
Control nuclei in hypothalamus and other brain stem regions, motor neurons in SC, peripheral...
 
Neural Pathways
8
Soma in brainstem or SC, ends in ganglion
 
Preganglionic
9
Begins in ganglion and extends to target cells
 
Post ganglionic
10
Short preganglionic and long postganglionic fibers, cell bodies in lateral horns and nearby...
 
Sympathetic Division; also called thoracolumbar,
11
Small myelinated, enter ganglia via white communicating rami
 
Preganglionic
12
Unmyelinated, exit ganglia by gray communicating rami or other route
 
Postganglionic
13
Enter ganglia, take one of 3 paths (end and synapse, go up or down the chain, pass through...
 
Preganglionic
14
secretes steroid hormones
 
Adrenal Cortex
15
modified postganglionic sympathetic neurons, secretes hormones epinephrine (85%) and norepinephrine...
 
Adrenal Medulla
16
Also called craniosacral division, long preganglionic and short postganglionic fibers,...
 
Parasympathetic Division
17
preganglionic fibers end in terminal ganglia in or near target, little divergence more...
 
SC
18
exit via 4 cranial nerves, III Oculomotor, VII Facial, IX Glossopharyngeal,...
 
Preganglionic (brainstem)
19
 (lens and pupil of eye)
 
III Oculomotor
20
(tear, salivary, nasal glands)
 
VII Facial
21
(parotid salivary glands
 
IX Glossopharyngeal
22
contains 90% of all PS preganglionic fibers, (heart, bronchi, blood vessels to lungs, esophagus,...
 
X Vagus
23
form Pelvic Splanchnic ns.: (distal half colon, rectum, bladder, reproductive organs)
 
Preganglionic (sacral cord)
24
Within walls of digestive tract, innervates smooth muscle and glands, regulates motility of...
 
Enteric Nervous System
25
Secrete ACh, released by all Sym & Parasym PG fibers & Parasym POG fibers, a...
 
Cholinergic Fibers
26
all cardiac muscle, smooth muscle, and glands, two types, work via 2nd messenger systems
 
Muscarinic Receptors
27
all synapses in autonomic ganglia, cells in adrenal medulla, at neuromuscular junction, always...
 
Nicotinic Receptors
28
Secrete NE, released by almost all POG Sym fibers
 
Adrenergic Fibers
29
usually excitatory, two subclasses cause different effects, α1 (suppress synthesis...
 
α-Adrenergic Receptors
30
usually inhibitory, two subclasses cause different effects, β1 & β2 (use...
 
β-Adrenergic Receptors
31

tend...

 
Sympathetic Effects
32
Most viscera receive dual innervation
 
Dual Innervation
33
.
 
.
34
cardiac, digestive, pupils,
 
Antagonistic Effects
35
salivary glands
 
Cooperative Effects
36
partial constriction of vessels due to baseline sympathetic innervation
 
Vasomotor Tone
37
Limbic system provides a pathway connecting sensory and mental experiences with the ANS
 
Cerebral Cortex
38
Major control center of the ANS, includes hunger, thirst, thermoregulation, emotions, and sexuality,...
 
Hypothalamus
39
House numerous ANS nuclei many in the reticular formation, for cardiac, vasomotor, salivation,...
 
Midbrain, Pons and Medulla Oblongata:
40
Autonomic reflexes like micturation, defecation, erection, and ejaculation are integrated in...
 
Spinal Cord

No comments yet! Be the first to add a comment below!

Please login to post comments.
After login, we will forward you back to this flashcard.


Upgrade and get a lot more done!
Upgrade    Cancel