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SCI220 Anatomy

Week 8: CNS, PNS, & ANS

QuestionAnswer
How many pairs of spinal nerves are connected to the spinal cord? 31
A subdivision of the nervous system that regulates involuntary effectors is the _____ nervous system. autonomic
The enteric nervous system is made up of a complex network of nerve plexuses that control the visceral effectors in the intestinal wall.
The three divisions of the brain that make up the brainstem are the medulla oblongata, midbrain, and pons.
The lower end of the spinal cord, with its attached spinal nerve roots, gives the appearance of a horse’s tail called the cauda equina
Individual nerves that emerge from the _____ plexus innervate the lower part of the shoulder and the entire arm. brachial
The ventral rami of most spinal nerves subdivide to form complex networks called plexuses
Formation of the cerebrospinal fluid occurs in the choroid plexus
Dendrites and cell bodies of sympathetic preganglionic neurons are located in the gray matter of the thoracic and upper lumbar segments of the spinal cord.
If you trace the axon inside the sympathetic chain ganglion, the preganglionic fiber branches along which pathway? synapses w/ sympathetic postganglionic neuron ascending /descending branches through the sympathetic trunk to synapse with postganglionic neurons in other chain ganglia passes through one or more ganglia without synapsing Correct Answer: all of the
The two efferent divisions of the autonomic nervous system are the sympathetic and parasympathetic divisions.
The dorsal root of each spinal nerve is easily recognized as a swelling called the dorsal root ganglion.
The inner protective covering of the brain is called the meninges.
The large fluid-filled spaces within the brain are called the ventricles.
Spinal cord tracts provide conduction paths to and from the brain. The tracts that conduct sensory impulses down the cord from the brain are called _____ tracts. descending
The phrenic nerve is found in the _____ plexus. cervical
The brainstem does not include the: cerebellum.
Sensory neurons can operate in autonomic reflex arcs. True
All cell bodies of the autonomic nervous system are located within the CNS. False
Axon terminals that secrete acetylcholine are called cholinergic terminals. True
The autonomic nervous system includes only efferent neurons. False
Some parasympathetic postganglionic neurons have their cell bodies in nuclei in the brainstem. False
Spinal nerves are _____ fibers. motor and sensory
Which of the following is not a plexus of the spinal nerves? Thoracic
All of the following are characteristics of sympathetic preganglionic neurons except: they have long fibers from CNS to ganglion
Several “vital centers” are located in the: medulla.
The main divisions of the central nervous system are the: brain and spinal cord.
Impulses from which system play a part in arousing or alerting the cerebrum? Reticular activating system
The layer of the meninges that serves as the inner periosteum of the cranial bone is the: Dura mater
The peripheral nervous system includes: only cranial nerves, spinal nerves, and their branches.
Beta receptors: bind norepinephrine.
Cerebrospinal fluid is found in all of the following except the: subdural space
Which of the following is not true of the lateral corticospinal tract fibers? Most inhibit the lower motor neuron.
Which part of the brain releases the hormone melatonin? Pineal gland
Which of the following cranial nerves is responsible for movements of the tongue? Hypoglossal
Which plexus contains nerves that innervate the lower part of the shoulder and the entire arm? Brachial
The areas specializing in language functions are found in the left cerebral hemisphere in: about 90% of the population.
The sensory cranial nerves include only the: olfactory, optic, and vestibulocochlear.
The lumbar plexus gives rise to the _____ nerve. Femoral
If you were to damage some of the preganglionic fibers that enter the celiac ganglion, what effect would this have on sympathetic stimulation? Hormones secreted by the adrenal medulla may not reach the various sympathetic effectors, thus delaying the effects of sympathetic stimulation.
Which of the following might occur from the stimulation of parasympathetic fibers? Increased peristalsis in the digestive tract
Conduction to autonomic effectors requires only one efferent neuron. False
There are _____ ventricles in the brain. four
The brain has _____ major divisions. six
The cranial nerve that arises from the spinal cord is the: accessory.
The innermost layer of the meninges is the: pia mater.
All of the following cranial nerves have a functional classification of motor except: vestibulocochlear.
The part(s) of the cerebrum associated with anger, fear, and sorrow is (are) the: limbic system.
“Fight-or-flight” physiological changes include all of the following except: constriction of respiratory airways.
Which is not true about sympathetic postganglionic neurons? They produce acetylcholine.
A patient complains of numbness in the skin of the buttocks and the posterior surface of the thigh and leg. The spinal nerve or peripheral branch most likely involved with this condition is the _____ plexus. coccygeal
Parasympathetic neuron cell bodies are located in: nuclei of the brainstem and the lateral gray columns of the sacral cord.
The nerve commonly called the vagus nerve is the _____ cranial. tenth
The cervical plexus: is found deep in the neck. is formed by the ventral rami of the first four cervical nerves and part of C5. includes the phrenic nerve. All of the above are correct.
The pyramids are formed in the: medulla.
Which part of the vertebral column has one more pair of nerves coming from it than it has vertebrae? Cervical
Nerve fibers of the spinothalamic tract are: sensory.
Visceral effectors are innervated by sympathetic fibers. True
Effectors that have single innervation by the autonomic nervous system are innervated only by the parasympathetic division. False
Created by: DiwanaD
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