Ch. 14 ANS Flashcards
What axon releases the neurotransmitter Norepinephrine?
The terminus of a sympathetic postganglionic neuron
Which division of the nervous system has long preganglionic neurons?
Parasympathetic
Which target organ is not affected by the parasympathetic division of the autonomic nervous system (ANS)?
A) Liver
B) Heart
C) Lungs
D) Adrenal medulla
Adrenal medulla
Identify the series of events in a sympathetic pathway.
Thoracolumbar origin, short preganglionic fiber, ACh release at ganglion, long postganglionic fiber, NE release at effector
What is an effect of norepinephrine binding to beta 2 adrenergic receptors?
Vasodilation
The ? oversees ANS activity.
Hypothalamus
The root word ______ means exhibiting or stimulating activity.
-ergic
The word root_______ means viscera.
Splanchn-
The vessels serving abdominal organs are collectively called _______ circulation.
Splanchnic
Neurons which have epinephrine as a neurotransmitter are _______ neurons.
Adrenergic
Secreted by preganglionic sympathetic fibers.
Acetylcholine
Secreted by preganglionic parasympathetic fibers.
Acetylcholine
Secreted by postganglionic sympathetic fibers to sweat glands.
Acetylcholine
Secreted by postganglionic parasympathetic fibers.
Acetylcholine
Secreted by most postganglionic sympathetic fibers.
Norepinephrine (NE)
What nervous system has short preganglionic and long postganglionic fibers?
Sympathetic
All of the following characterize the ANS except:
A) Two-neuron efferent chain
B) Presence of neron cell bodies in the CNS
C) Presence of neuron cell bodies in the ganglia
D) Innervation of skeletal muscles
Innervation of skeletal muscles
Adrenergic fibers are found in the ? system.
Sympathetic
The ? system increases heart rate and blood pressure.
Sympathetic
The ? system increases gastric motility and secretion.
Parasympathetic
The ? system innervates blood vessels.
Sympathetic
The white rami communicantes contain what kind of fibers?
Preganglionic Sympathetic
All preganglionic ANS fibers secrete ?
Acetylchonline
All postganglionic fibers of the parasympathetic nervous system secrete?
Acetylcholine
Only postganglionic sympathetic fibers secrete ?
Norepinephrine
Where are the cell bodies of visceral sensory neurons?
Dorsal root ganglia and in the sensory ganglia of cranial nerves
Postganglionic axons of the ? division secrete norepinephrine.
Sympathetic
Postganglionic axons of the ? division secrete acetylcholine.
Parasympathetic
The ? division consists of long preganglionic and short postganglionic axons.
Parasympathetic
The ? division consists of short preganglionic and long postganglionic axons.
Sympathetic
The ? division arises from cranial and sacral nerves.
Parasympathetic
The ? division arises from spinal nerves T1 - L3.
Sympathetic
The ? division causes dry mouth and dilates bronchioles.
Sympathetic
The ? division constricts pupils and decreases heart rate.
Parasympathetic
Parasympathetic preganglionic neurons arise from ? and ?
Brain stem and Sacrum
Preganglionic sympathetic axons leave the spinal cord via the ?
White rami communicantes
Cholinergic (ACh) receptors are classified as either ? or ?
Nicotinic or Muscarinic
Adrenergic (NE) receptors are classified as :
Alpha 1 or 2
Beta 1, 2 or 3
Most visceral organs are innervated by ? division.
A) Parasympathetic
B) Sympathetic
C) Both
Both
Preganglionic neurons develop from the ?
Neural tube
