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Bio 201 Exam -67 Questions Solved 100% Correct
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Bio 201 Exam -67 Questions Solved 100% Correct
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Bio 201 Exam -67 Questions Solved100% Correct
Where do the preganglionic fibers of the sympathetic system arise? - Answer In the
lateral horns from the thoracic region down to the second lumbar region of the
spinal cord
The most likely explanation for hypertension - Answer There is an overactive
sympathetic vasoconstrictor response
Describe nicotinic receptors - Answer They are always stimulatory
A parasympathetic response - Answer Secretion of acetylcholine
What is the sympathetic chain? - Answer A double row of ganglia on either side of the
vertebra that allows axons to ascend or descend to a different ganglion in the chain
Describe the organization of the peripheral nervous system - Answer The autonomic
system consist of two divisions: the sympathetic and the parasympathetic
An autonomic nervous system function controlled by the hypothalamus - Answer Blood
pressure
, Describe the somatic nervous system - Answer It's target organs are skeletal muscles
What nerves account for the majority of the preganglionic fibers of the
parasympathetic system? - Answer Vagus nerve
Which organ exhibit parasympathetic tone? - Answer Heart, digestive, and urinary
organs
How does the parasympathetic system affect the eyes? - Answer The contracts the
ciliary muscle and constricts the pupil
Describe the anatomy of the parasympathetic fibers - Answer They have
terminal ganglia that are close to the effectors
Characteristic of the autonomic nervous system - Answer It has one ganglion in
each motor unit located outside the CNS
Characteristic of the parasympathetic nervous system - Answer It increases
digestive activity
What is a cholinergic fiber? - Answer It has fibers that release acetylcholine
Describe the anatomy of sympathetic fibers - Answer They have ganglia that are close
to the CNS
Parasympathetic control of the heart is served by which nerves? - Answer Vagus nerve
and cardiac plexus
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