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Autonomic system
chapter 12
| Question | Answer |
|---|---|
| SYMPATHETIC NERVOUS SYSTEM= | FIGHT OR FLIGHT SYSTEMACTIVE DURING TIMES OF STRESS/OR FEELING THREATENED(INCREASE HEART RATE,PUPILS DILATE) |
| INNERVATE BLOOD VESSELS= | INCREASE STIMULATION:(BLOOD VESSELS-CONSTRICT)DECREASE STIMULATION:(BLOOD VESSELS-DILATE) |
| PARASYMPATHETIC NERVOUS SYSTEM= | RESTING AND DIGESTING SYSTEM{NONSTRESSFUL CONDITIONS}(decrease heart rate)pupils constrict |
| SYMPATHOLYTIC DRUGS= | prevents the increase in cardiac activity when the sympathetic nerves are fired |
| PARASYMPATHOLYTIC DRUG= | BLOCKS THE PARASYMPATHETIC EFFECT ON THE HEART;INCREASES H RATE |
| AUTONOMIC TONE= | parasympathetic tone is dominate,but sympathetic tone can override it all any time-in slight contraction |
| VASOMOTOR TONE= | blood vessels are innervated by the sympathetic NS only(bl vess)constrict to increase BP{dilate to decrease BP} |
| Preganglionic neurons= | travel from CNS to the ganglion{group of cell bodies in PNS |
| POSTGANLIONIC NEURONS= | travel from the ganglion to the target organ |
| SYMPATHETIC NERVOUS SYSTEM= | short preganglionic fibers.long postganglionic fibers (thoracolumbar division |
| NEUROTRANSMITTERS= | Ach secreted by sympathetic preganglionic fibers NE secreted by sympathetic postganglionic fibers |
| Adrenergic fiber (NE is also called noradrenaline) | secretes NE (norepinephrine) |
| Cholinergic fiber | secretes ACH (acetlchorine) |
Created by:
T..Doyle
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