anatomy - chapter 7 nervous system mc
Cerebrospinal fluid is formed from blood by clusters of capillaries in the brain known as ________. A) choroid plexuses B) arachnoid villi C) ventricles D) sinuses
A) choroid plexuses
The large fiber tract that allows communication between the two cerebral hemispheres is called the ________. A) corpus callosum B) fornix C) pons D) thalamus
A) corpus callosum
________ disease results from a degeneration of the dopamine-releasing neurons of the substantia nigra. A) Parkinson's B) Alzheimer's C) Huntington's D) Autoimmune
A) Parkinson's
One of the major functions of the pons is to control ________. A) breathing B) hunger C) thirst D) consciousness
A) breathing
The nervous system is structurally subdivided into two systems: ________ nervous system and ________ nervous system. A) central; peripheral B) somatic; autonomic C) parasympathetic; sympathetic D) autonomic; sympathetic
A) central; peripheral
Which of the following brain dysfunctions is also known as a stroke? A) cerebrovascular accident (CVA) B) Alzheimer's disease C) aphasia D) cerebral edema E) Parkinson's disease
A) cerebrovascular accident (CVA)
The brain dysfunction where blood supply to a region (or regions) of the brain is blocked and vital brain tissue dies, as by a blood clot or a ruptured blood vessel, is called ________. A) cerebrovascular accident (CVA), or stroke B) Parkinson's disease C) Huntington's disease D) multiple sclerosis
A) cerebrovascular accident (CVA), or stroke
In contrast to the somatic nervous system, the autonomic nervous system ________. A) has a chain of two motor neurons B) has a chain of two sensory neurons C) stimulates its effector cells D) has both sensory and motor fibers E) is a subdivision of the central nervous system
A) has a chain of two motor neurons
One of the last areas of the CNS to mature is the ________, which regulates body temperature. A) hypothalamus B) thalamus C) cerebellum D) cerebrum
A) hypothalamus
Impulse conduction is fastest in neurons that are ________. A) myelinated B) unmyelinated C) sensory D) motor E) cerebral
A) myelinated
The primary somatic sensory cortex is located in the ________ lobe of the cerebrum. A) parietal B) frontal C) temporal D) occipital
A) parietal
The sensory homunculus is located in the primary somatic sensory area in the ________. A) parietal lobe B) occipital lobe C) frontal lobe D) temporal lobe E) cerebellum
A) parietal lobe
During the resting state, a neuron is ________. A) polarized with more sodium ions outside the cell and more potassium ions inside the cell B) propagating the action potential C) depolarizing and generating an action potential D) restoring the ionic conditions utilizing the sodium-potassium pump E) repolarizing as potassium ions diffuse out of the cell
A) polarized with more sodium ions outside the cell and more potassium ions inside the cell
Each spinal nerve divides into a dorsal and a ventral ________. A) ramus B) tract C) ganglion D) plexus
A) ramus
Nerve impulse transmissions occurring along myelinated neurons are called ________. A) saltatory conduction B) threshold C) graded potential D) sodium-potassium pump E) all-or-none response
A) saltatory conduction
During repolarization, ________ ions are pumped out of the cell. A) sodium B) potassium C) both sodium and potassium D) calcium
A) sodium
Sweat glands that produce perspiration when stimulated are innervated only by the ________ fibers. A) sympathetic B) parasympathetic C) somatic D) afferent
A) sympathetic
Preparing the body for the "fight-or-flight" response during threatening situations is the role of the ________. A) sympathetic nervous system B) cerebrum C) parasympathetic nervous system D) somatic nervous system E) afferent nervous system
A) sympathetic nervous system
The gap between two communicating neurons is termed ________. A) synaptic cleft B) cell body C) effector D) Schwann cell E) node of Ranvier
A) synaptic cleft
Cell bodies of the sensory neurons of the spinal nerves are located in ________. A) the dorsal root ganglia of the spinal cord B) the ventral root ganglia of the spinal cord C) the thalamus D) the hypothalamus E) sympathetic ganglia
A) the dorsal root ganglia of the spinal cord
Bundles of nerve fibers (neuron processes) running through the CNS are called ________, whereas in the PNS they are called ________. A) tracts; nerves B) gray matter; white matter C) axons; dendrites D) afferent neurons; efferent neurons
A) tracts; nerves
Which of these neuroglial cells forms the myelin sheath in the central nervous system? A) astrocytes B) oligodendrocytes C) Schwann cells D) ependymal cells E) satellite cells
B) oligodendrocytes
The effects of the sympathetic nervous system are essentially opposite of the ________. A) central nervous system B) parasympathetic nervous system C) autonomic nervous system D) motor division E) sensory division
B) parasympathetic nervous system
The hypothalamus regulates the ________. A) pineal gland B) pituitary gland C) pons D) thalamus
B) pituitary gland
Sensory receptors located in muscles and tendons are termed ________. A) Meissner's corpuscles B) proprioceptors C) lamellar corpuscles D) association neurons
B) proprioceptors
The midbrain, pons, and medulla oblongata are housed in the ________. A) diencephalon B) hypothalamus C) brain stem D) pineal gland E) cerebellum
C) brain stem
Ganglia are collections of ________. A) nuclei B) dendrites C) cell bodies D) axons E) axon terminals
C) cell bodies
Loss of muscle coordination results from damage to the ________. A) cerebrum B) hypothalamus C) cerebellum D) thalamus E) midbrain
C) cerebellum
Which of the following is favored by the parasympathetic nervous system? A) emergency B) exercise C) digestion D) embarrassment E) excitement
C) digestion
A stroke in the primary motor area has caused Don to lose control over his skeletal muscles on the right side of his body. What lobe of his brain was damaged? A) occipital lobe B) temporal lobe C) frontal lobe D) parietal lobe E) pyramidal tract
C) frontal lobe
Control of temperature, endocrine activity, metabolism, and thirst are functions associated with the ________. A) medulla oblongata B) cerebellum C) hypothalamus D) thalamus E) cerebrum
C) hypothalamus
The two major functional properties of neurons are ________. A) cover and line body surfaces B) contraction and movements C) irritability and conductivity D) connect and protect E) lubricate and secrete
C) irritability and conductivity
The hypothalamus is the "emotional-visceral" center of the brain and, thus, is an important part of the ________. A) posterior association area B) reticular activating system C) limbic system D) Broca's area E) anterior association area
C) limbic system
The brain and spinal cord are protected and cushioned by three connective tissue membranes that are collectively called ________. A) ventricles B) arachnoid villi C) meninges D) sinuses
C) meninges
The cell bodies of the ________ neurons are always located within the CNS. A) proprioceptor B) afferent C) motor D) sensory
C) motor
The gaps between Schwann cells found at regular intervals in peripheral system neurons are called ________. A) synaptic clefts B) axon terminals C) nodes of Ranvier D) myelin sheaths
C) nodes of Ranvier
Cranial nerve III is known as the ________ nerve. A) optic B) olfactory C) oculomotor D) trochlear
C) oculomotor
The ________ division of the autonomic nervous system is often called the "rest-and-digest" division. A) somatic B) sympathetic C) parasympathetic D) afferent
C) parasympathetic
The ________ is a connective tissue wrapping around fascicles of neuron fibers. A) epineurium B) endoneurium C) perineurium D) perimysium
C) perineurium
The ventral rami of the spinal nerves form complex networks of nerves known as a ________. A) ganglion B) reflex C) plexus D) tract E) fascicle
C) plexus
Fibers that carry information from the skin, joints, and skeletal muscles to the central nervous system are ________. A) motor B) visceral sensory C) somatic sensory D) interneurons (association neurons) E) parasympathetic
C) somatic sensory
The portion of the diencephalon that acts as a relay station for sensory impulses traveling to the sensory cortex is the ________. A) pons B) pituitary gland C) thalamus D) hypothalamus
C) thalamus
Sally has a brain injury; she knows what she wants to say but can't vocalize the words. The part of her brain that deals with the ability to speak is the ________. A) longitudinal fissure B) gyrus C) central sulcus D) Broca's area E) primary motor area
D) Broca's area
The spinal cord terminates around vertebra ________. A) C7 B) T2 C) T9 D) L3 E) S4
D) L3
The Schwann cell forms a myelin sheath around the ________. A) dendrites B) cell body C) nucleus D) axon E) nodes of Ranvier
D) axon
The part of the neuron that typically conducts nerve impulses away from the cell body is the ________. A) dendrite B) cell body C) synaptic cleft D) axon
D) axon
Which ion causes neurotransmitter vesicles to fuse with the axon's membrane during the conduction of a nerve impulse from one neuron to the next? A) chlorine B) sodium C) potassium D) calcium E) magnesium
D) calcium
The sciatic nerve is the largest nerve in the body resulting from a combination of which two nerves? A) pudendal and femoral nerves B) femoral and tibial nerves C) pudendal and common peroneal nerves D) common fibular and tibial nerves E) pudendal and tibial nerves
D) common fibular and tibial nerves
________ connect sensory and motor neurons in neural pathways and their cell bodies are typically located in the central nervous system. A) Interneurons (association neurons) B) Afferent C) Efferent D) Proprioceptors
A) Interneurons
The axon is indicated by ________. A) Label B B) Label F C) Label H D) Label I E) Label A
A) Label B
The metabolic center of the neuron is indicated by ________. A) Label D B) Label F C) Label A D) Label H E) Label I
A) Label D
The nucleus of the neuron is indicated by ________. A) Label E B) Label I C) Label A D) Label B E) Label F
A) Label E
Which one of the following is the correct sequence of events that correlates to the sequence of events of a nerve impulse? 1. the membrane becomes depolarized 2. sodium channels open and sodium ions diffuse inward 3. the membrane becomes repolarized 4. potassium channels open and potassium ions diffuse outward while sodium is actively transported out of the cell A) 3, 2, 4, 1 B) 2, 1, 4, 3 C) 2, 1, 3, 4 D) 1, 2, 4, 3 E) 4, 1, 3, 2
B) 2, 1, 4, 3
The gaps between Schwann cells are indicated by ________. A) Label D B) Label H C) Label B D) Label F E) Label A
B) Label H
Hemiplegia and aphasia characterize those patients who have experienced a ________. A) concussion B) cerebrovascular accident (CVA), or stroke C) contusion D) cerebral edema
B) cerebrovascular accident (CVA), or stroke
What part of the brain stem houses reflex centers for vision and hearing? A) pons B) corpora quadrigemina C) fourth ventricle D) medulla oblongata E) reticular formation
B) corpora quadrigemina
Cerebrospinal fluid circulates through all of the following EXCEPT ________. A) subarachnoid space B) corpus callosum C) cerebral aqueduct D) fourth ventricle E) lateral ventricles
B) corpus callosum
Which cranial nerves control eye movement? A) cranial nerve II, IV, V B) cranial nerve III, IV, VI C) cranial nerve V, VI, VIII D) cranial nerve VIII, X, XII E) cranial nerve IX, X, XI
B) cranial nerve III, IV, VI
The neuron processes that normally receive incoming stimuli are called ________. A) axons B) dendrites C) neurolemmas D) Schwann cells E) satellite cells
B) dendrites
The thalamus, hypothalamus, and epithalamus collectively constitute the ________. A) cerebellum B) dicephalon (interbrain) C) brain stem D) cerebrum
B) dicephalon (interbrain)
Which one of the following is the correct sequence in connective tissue sheaths, going from outermost to innermost layer? A) epineurium, endoneurium, perineurium B) epineurium, perineurium, endoneurium C) perineurium, epineurium, endoneurium D) perineurium, endoneurium, epineurium E) endoneurium, epineurium, perineurium
B) epineurium, perineurium, endoneurium
The fissure in the brain that separates the two cerebral hemispheres is called the ________. A) transverse fissure B) longitudinal fissure C) sagittal fissure D) tentorium cerebelli
B) longitudinal fissure
The vital centers for the control of visceral activities such as heart rate, breathing, blood pressure, swallowing, and vomiting are located in the ________. A) pons B) medulla oblongata C) midbrain D) cerebrum E) hypothalamus
B) medulla oblongata
Neurons with several processes branching off the cell body, such as motor neurons and interneurons (association neurons), are structurally classified as ________. A) efferent B) multipolar C) afferent D) bipolar E) unipolar
B) multipolar
Support cells in the central nervous system are collectively called ________. A) myelin sheaths B) neuroglia C) oligodendrocytes D) microglia
B) neuroglia
Which of the following is the correct sequence in a typical reflex arc? A) effector, sensory neuron, integration center, motor neuron, receptor B) receptor, sensory neuron, integration center, motor neuron, effector C) effector, motor neuron, integration center, sensory neuron, receptor D) receptor, motor neuron, integration center, sensory neuron, effector E) receptor, sensory neuron, motor neuron, integration center, effector
B) receptor, sensory neuron, integration center, motor neuron, effector
A special group of neurons in the brain stem that plays a role in consciousness and the awake/sleep cycles is the ________. A) thalamus B) reticular activating system (RAS) C) pineal gland D) limbic system E) cerebellum
B) reticular activating system (RAS)
The largest nerve in the body, the sciatic nerve, belongs to the ________ nerve plexus. A) lumbar B) sacral C) brachial D) cervical
B) sacral
An action potential is caused by an influx of these ions into the cell ________. A) potassium B) sodium C) calcium D) magnesium E) both potassium and sodium
B) sodium
Neurons either conduct action potentials along the length of their axons, or they remain at rest. This statement best describes ________. A) a reflex arc B) the all-or-none response C) repolarization D) saltatory conduction E) graded potential
B) the all-or-none response
The number of neurons involved in transmission of impulses in the autonomic nervous system is ________. A) one B) two C) four D) eight
B) two
Which cranial nerve descends into the thoracic and abdominal cavities to regulate heart rate and promote digestive activity? A) oculomotor B) vagus C) hypoglossal D) accessory E) glossopharyngeal
B) vagus
There are ________ pairs of cranial nerves and ________ pairs of spinal nerves in the peripheral nervous system. A) 5; 7 B) 18; 34 C) 12; 31 D) 15; 25
C) 12; 31
________ reflexes include the secretion of saliva, changes in the size of our pupils, and digestion involve the activities of smooth muscles. A) Somatic B) Voluntary C) Autonomic D) Sympathetic
C) Autonomic
The neural processes that convey incoming messages toward the cell body are indicated by ________. A) Label H B) Label G C) Label A D) Label F E) Label B
C) Label A
________ cells form the myelin sheaths around nerve fibers in the PNS. A) Satellite B) Ependymal C) Schwann D) Nerve
C) Schwann
The substance that is released at axonal endings to propagate a nervous impulse is called ________. A) an ion B) nerve glue C) a neurotransmitter D) the sodium-potassium pump E) an action potential
C) a neurotransmitter
Cerebrospinal fluid is reabsorbed into venous blood in the dural sinuses via the ________. A) cerebral aqueduct B) hypothalamus C) arachnoid villus D) choroid plexus E) pons
C) arachnoid villus
Which nervous system subdivision is a chain of two motor neurons consisting of a preganglionic neuron and a postganglionic neuron? A) somatic B) central C) autonomic D) skeletal E) sensory
C) autonomic
The sympathetic and parasympathetic nervous systems are subdivisions of the ________. A) central nervous system B) voluntary nervous system C) autonomic nervous system D) somatic nervous system E) peripheral nervous system
C) autonomic nervous system
The major role of the interneuron (association neuron) is to ________. A) carry information from the central nervous system to muscles and/or the viscera B) form a lipid-protein (lipoprotein) cell membrane on the outside of axons C) transmit nerve impulses from the skin and organs to the central nervous system D) connect motor and sensory neurons in their pathways E) detect the amount of stretch in skeletal muscles or tendons and their joints
D) connect motor and sensory neurons in their pathways
Bipolar neurons are commonly ________. A) motor neurons B) called neuroglia C) found in ganglia D) found in the eye and nose E) more abundant in adults than in children
D) found in the eye and nose
The cerebrospinal fluid ________. A) is secreted by the arachnoid villi B) enters the four ventricles after filling and circulating through the subarachnoid space C) is secreted mostly by the ependymal cells lining the brain ventricles D) is continually formed mostly by the choroid plexuses E) is identical in composition to whole blood
D) is continually formed mostly by the choroid plexuses
The delicate innermost membrane, or meningeal layer, that clings to the surface of the brain and spinal cord is known as the ________ mater. A) dura B) arachnoid C) periosteal D) pia
D) pia
Immediately after an action potential is propagated, which one of the following ions rapidly diffuses out of the cell into the tissue fluid ________. A) sodium B) chloride C) calcium D) potassium E) magnesium
D) potassium
Each spinal nerve branches into a ventral and dorsal ________. A) root B) ganglion C) plexus D) ramus E) tract
D) ramus
Which type of reflex involves skeletal muscles? A) parasympathetic B) sympathetic C) autonomic D) somatic E) visceral
D) somatic
The blood-brain barrier is formed by ________ junctions that nearly seamlessly bind capillaries in the brain. A) gap B) intercalated C) desmosome D) tight
D) tight
How many pairs of cranial nerves branch from the surface of the brain? A) three B) five C) seven D) twelve E) eighteen
D) twelve
The only pair of cranial nerves to extend to the thoracic and abdominal cavities is the ________ nerves. A) glossopharyngeal B) oculomotor C) vestibulocochlear D) vagus
D) vagus
Myelinated fibers (tracts) form ________ matter while unmyelinated fibers form ________ matter. A) sensory; motor B) gray; white C) motor; sensory D) white; gray
D) white; gray
Rick quickly pulled his hand away from the hot stove. This reflex is best known as a(n) ________. A) two-neuron reflex B) patellar reflex C) knee-jerk reflex D) withdrawal reflex E) autonomic reflex
D) withdrawal reflex
The axon terminals are indicated by ________. A) Label I B) Label G C) Label B D) Label A E) Label C
E) Label C
The term central nervous system refers to the ________. A) autonomic and peripheral nervous systems B) brain, spinal cord, and cranial nerves C) brain and cranial nerves D) spinal cord and spinal nerves E) brain and spinal cord
E) brain and spinal cord
Which one of the following is the correct sequence of nerves that exit the spinal cord, from superior to inferior? A) thoracic spinal nerves, cervical spinal nerves, lumbar spinal nerves, sacral spinal nerves B) cervical spinal nerves, lumbar spinal nerves, thoracic spinal nerves, sacral spinal nerves C) thoracic spinal nerves, cervical spinal nerves, sacral spinal nerves, lumbar spinal nerves D) cervical spinal nerves, thoracic spinal nerves, sacral spinal nerves, lumbar spinal nerves E) cervical spinal nerves, thoracic spinal nerves, lumbar spinal nerves, sacral spinal nerves
E) cervical spinal nerves, thoracic spinal nerves, lumbar spinal nerves, sacral spinal nerves
Which of the following effects is characteristic of the parasympathetic nervous system? A) decreased activity of the digestive system B) stimulated sweat glands to produce perspiration C) decreased urine output D) increased metabolic rate E) decreased heart rate
E) decreased heart rate
Which one of the following represents the correct sequence from outermost to innermost layers of the meninges? A) pia mater, dura mater, arachnoid mater B) pia mater, arachnoid mater, dura mater C) arachnoid mater, dura mater, pia mater D) dura mater, pia mater, arachnoid mater E) dura mater, arachnoid mater, pia mater
E) dura mater, arachnoid mater, pia mater
Unmyelinated nerve fibers are known as ________. A) white matter B) sensors C) myelin sheaths D) receptors E) gray matter
E) gray matter
The blood-brain barrier is effective against the passage of ________. A) water B) nutrients such as glucose C) alcohol D) anesthetics E) metabolic waste such as urea
E) metabolic waste such as urea
Which of the following is NOT a major nerve of the brachial nerve plexus? A) radial B) axillary C) musculocutaneous D) median E) phrenic
E) phrenic
