Autonomic Nervous System
About this set
Created by:
MaryBeth_V on October 8, 2011
Subjects:
Classes:
Log in to favorite or report as inappropriate.
Order by
40 terms
Terms | Definitions |
|---|---|
 Autonomic | a better term may be "automatic;" it's self regulating and unconscious |
| Sympathetic | often called the thoracolumbar system due to location of preganglionic cell bodies; term from Galen who thought organs communicated and reacted; part of NS acts in sympathy with another part; fight or flight |
| ANS components | sympathetic and parasympathetic systems |
| Parasympathetic | often called the cranio-sacral or secretomotor system; found in cranial and sacral parts of the spinal cord |
| ANS neurons | efferent fibers that innervate smooth muscles and glands |
| # of neurons required to innervate smooth muscles and glands | 2; pre-ganglionic and post-ganglionic |
| Pre-ganglionic fiber cell body location | inside the CNS |
| Post-ganglionic fiber cell body location | outside the CNS |
| Sympathetic Pre-ganglionics location | inside the IMLCC from T1-L2 |
| IMLCC | Intermedial Lateral Cell Column |
| White Rami | where the pre-ganglionics enter the sympathetic chain |
| Grey Rami | where the post-ganglionics leave the sympathetic chain (para-vertebral) |
| Splanchnics | what the pre-ganglionics are called when they leave the chain (enters chain but doesn't synapse) |
| Greater Myelenated ganglia? | pre-ganglia (white) |
| Celiac and Superior & Inferior Mesenteric ganglion | pre-vertebral gannglion where splanchnics must synapse because of the 2 neuron rule |
| Which type of ganglia are in the skull? | post-ganglionics; no pre-ganglionics |
| Sympathomimetric drugs | drugs that mimic the sympathetic NS |
| Antagonists | have 2 opposite functions; 2 locations in the body: pupil and heart |
| Pupil sympathetic action | dilates |
| Pupil parasympathetic action | constricts |
| Heart sympathetic action | increase heart rate |
| Heart parasympathetic action | decrease heart rate |
| Gray rami | located everywhere |
| White rami | located from T1-L2 |
| ANS transmitters | Ach, norepinephrine, epinephrine |
| Pre-ganglionics transmitter | use Ach; both sympathetic and parasympathetic |
| Post-ganglionic sympathetic transmitter | release norepinephrine and epinephrine |
| Post-ganglionic parasympathetic transmitter | relsease Ach |
| Location of Nicotinic Receptors | post-ganglionic are or contain this at the autonomic ganglia |
| Action of Nicotinic Receptors | produce a quick opening of Na+ channels which generally produces an ESPS that causes an action potential; fast acting receptors |
| Location of Muscarinic Receptors | present at the effector organ |
| Action of Muscarinic Receptors | much slower and longer lasting response; 5 distinct receptors |
| B-receptors in blood vessels | produce dilation |
| a-receptors in blood vessels | produce constriction |
| Blood vessels supplying skin & organs | a-receptors |
| Blood vessels supplying muscles & heart | B-receptors |
| Sympathetic receptors | effector organ contains receptors that may produce very different functions |
| How does the CNS know the state of the innervated structure | general visceral afferent fibers from smooth muscles and organs transfer the info; unconscious information |
| Somatic Areas | pain from effector organs may be referred to in other areas |
| General Visceral Afferent Pain | organ doesn't know how to tell you it hurts so you get referred pain; ie: anoxia in the heart producing pain in the left shoulder |
First Time Here?
Welcome to Quizlet, a fun, free place to study. Try these flashcards, find others to study, or make your own.