Identify the postganglionic neurotransmitter present in the parasympathetic division of the ANS.
Postganglionic parasympathetic neurons release acetylcholine (ACh), and the postganglionic neurons of the sympathetic division use norepinephrine (NE). Propranolol is a drug used to avoid the physiological consequences of stage fright. Epinephrine is made from NE and effects on target tissues are identical to those caused by synaptic activation. Serotonin is made by neurons of the raphe nuclei.
The parasympathetic division of the ANS causes you to sweat profusely in reaction to embarrassment.
The responses produced by sympathetic division include increased heart rate and blood pressure, depressed digestive functions, and mobilized glucose reserves. The sympathetic division of the ANS causes you to sweat profusely in reaction to embarrassment. The parasympathetic division functions to slow down the heart rate, decrease the blood pressure, increase digestive functions, and stop sweating.
The somatic motor system and the ANS constitute the total output of the CNS.
Where are the lower motor neurons of the autonomic nervous system located?
The lower motor neurons of the autonomic nervous system are located outside the central nervous system within cell clusters called autonomic ganglia. One set of lower motor neurons is for the parasympathetic division and the other is for the sympathetic division. The cell bodies of all somatic lower motor neurons lie in the ventral horn of the spinal cord. Lower motor neurons of the autonomic nervous system are not located in the ventricular zone.
Which of the following is a function of the ANS?
Innervates the smooth muscle, cardiac muscle, and the glands
The ANS innervates the smooth muscle, cardiac muscle, and the glands. It does not command the skeletal muscle fibers or control the periventricular zone or the pituitary gland.
Which of the following is a neurotransmitter used by postganglionic fibers of the sympathetic division of the autonomic nervous system?
Postganglionic sympathetic fibers use norepinephrine. Parasympathetic postganglionic fibers use acetylcholine. Glycine or GABA is not used by the postganglionic fibers of the sympathetic division of the autonomic nervous system.
Cranial nerves with parasympathetic roots included the oculomotor (3), facial (7), glossopharyngeal (9) and accessory (11).
The Parasympathetic system has relatively long postganglionic fibers and short preganglionic fibers.
Parasympathetic system has long preganglionic fibers and short postganglionic fibers while the sympathetic system has long postganglionic fibers and short preganglionic fibers.
Where do preganglionic fibers in the ANS synapse with postganglionic fibers?
Which of the following statements regarding the sympathetic nervous system is correct?
Contains long postganglionic fibers and short preganglionic fibers.
Contains ganglia within the superior cervical, celiac and mesenteric body cavities.
Contains ganglia that lie close to the paravertebral chain of the spinal cord.
Contains preganglionic neurons in the lateral horn of the thoracic and lumbar spinal cord only.