Ch.14 – Verified Test Bank – Nervous System Spinal Cord and - Anatomy Integrative Approach 3e Complete Test Bank by Michael McKinley. DOCX document preview.
Anatomy & Physiology, 3e (McKinley)
Chapter 14 Nervous System: Spinal Cord and Spinal Nerves
1) What is the correct order for the parts of the spinal cord, from superior to inferior?
A) Cervical - thoracic - sacral - coccygeal - lumbar
B) Cervical - thoracic - lumbar - sacral - coccygeal
C) Thoracic - lumbar - sacral - cervical - coccygeal
D) Thoracic - cervical - lumbar - coccygeal - sacral
E) Thoracic - lumbar - sacral - coccygeal - cervical
2) A typical spinal cord in an adult is
A) 24–26 inches long.
B) 12–14 inches long.
C) 8–10 inches long.
D) 16–18 inches long.
E) 20–24 inches long.
3) In adults, the spinal cord is not the same length as the vertebral canal, and most of the lumbar part of the spinal cord is within
A) the coccyx.
B) the sacrum.
C) the cervical vertebrae.
D) the thoracic vertebrae.
E) the cauda equina.
4) The inferior tip of the spinal cord is the ________ part.
A) thoracic
B) lumbar
C) coccygeal
D) cervical
E) sacral
5) What is the thin strand of pia mater that helps to anchor the spinal cord to the coccyx?
A) Conus medullaris
B) Cervical enlargement
C) Terminus coccyx
D) Filum terminale
E) Coccygeal tendon
6) The spinal cord part with the largest diameter is the ________ part.
A) thoracic
B) cervical
C) lumbar
D) sacral
E) coccygeal
7) The tapered, conical inferior end of the spinal cord is called the conus
A) finalis.
B) medullaris.
C) equine.
D) caudalis.
E) sacralis.
8) Each side of the spinal cord gives rise to ________ cervical nerves.
A) two
B) six
C) seven
D) eight
E) twelve
9) The most inferior spinal nerve is
A) C7.
B) C8.
C) Co1.
D) Co7.
E) CN XII.
10) Which statement accurately describes spinal nerves?
A) Most spinal nerves are motor nerves.
B) Each spinal nerve is mixed in that it contains some sensory axons and some motor axons.
C) All spinal nerves are sensory nerves.
D) Odd-numbered spinal nerves are sensory and even-numbered spinal nerves are motor.
E) Spinal nerves are central axons contained within the vertebral canal.
11) Which space associated with the spinal cord meninges contains areolar connective tissue, blood vessels, and adipose connective tissue?
A) Subarachnoid space
B) Epidural space
C) Central canal
D) Subdural space
E) Epiarachnoid space
12) The subdural space is the region between the arachnoid mater and the dura mater.
13) The spinal dura mater contains an outer periosteal layer and an inner meningeal layer.
14) Which space associated with the spinal cord meninges contains cerebrospinal fluid?
A) Epidural space
B) Subdural space
C) Subarachnoid space
D) Epiarachnoid space
E) Subpial space
15) In a lumbar puncture (spinal tap), fluid is extracted from the
A) central canal of the spinal cord.
B) epidural space.
C) subdural space.
D) epipial space.
E) subarachnoid space.
16) The most delicate of the meninges consists of elastic and collagen fibers and is known as the
A) pia mater.
B) dura mater.
C) falx cerebri.
D) arachnoid mater.
17) The innermost of the meninges is the pia mater.
18) Paired, lateral triangular extensions of the spinal pia mater that extend to the dura to suspend and anchor the spinal cord are known as ________ ligaments.
19) The posterior horns of the spinal cord contain
A) axons of motor neurons and cell bodies of interneurons.
B) axons of sensory and motor neurons.
C) axons of interneurons.
D) axons of sensory neurons and cell bodies of interneurons.
E) autonomic motor neurons.
20) The lateral horns of the spinal cord contain
A) axons of motor neurons and interneuron cell bodies.
B) axons of sensory and motor neurons.
C) cell bodies of somatic sensory neurons.
D) axons of sensory neurons and interneuron cell bodies.
E) cell bodies of autonomic motor neurons.
21) This structure contains unmyelinated axons and serves as a communication route between the right and left sides of the gray matter in the spinal cord.
A) Gray commissure
B) White commissure
C) Lateral commissure
D) Posterior commissure
E) Denticulate ligaments
22) Nuclei within the gray matter of the spinal cord that receive information from sensory receptors such as pain or pressure receptors in the skin are ________ nuclei.
A) visceral sensory
B) somatic sensory
C) autonomic motor
D) somatic motor
23) The ________ nuclei within the gray matter of the spinal cord send nerve impulses to skeletal muscles.
A) visceral sensory
B) somatic sensory
C) autonomic motor
D) somatic motor
24) These nuclei are located in the lateral horns and innervate smooth muscle, cardiac muscle, and glands.
A) Sensory nuclei
B) Autonomic motor nuclei
C) Visceral sensory nuclei
D) Somatic sensory nuclei
E) Somatic motor nuclei
25) In sum, there are ________ pairs of spinal nerves.
A) 13
B) 31
C) 40
D) 51
E) 12
26) The white matter of the spinal cord is surrounded by its grey matter.
27) The lateral funiculus contains both ascending and descending tracts.
28) The large section of spinal white matter that is found between the posterior gray horns is known as the posterior
A) commissure.
B) funiculus.
C) decussation.
D) peduncle.
29) Which of the following accurately compares sections of spinal white matter?
A) A fasciculus is smaller than a funiculus.
B) A fasciculus is larger than a funiculus.
C) A fasciculus is smaller than a tract.
D) A fasciculus is larger than a tract.
30) An individual tract within the spinal cord contains either sensory nerve signals or motor nerve signals only.
31) A conduction pathway consists of a
A) nerve and an effector.
B) nerve and a tract.
C) ganglion and a nucleus.
D) tract and a nucleus.
32) A pathway has two parts: a bundle of CNS axons and a collection of neuron cell bodies in the CNS.
33) Motor pathways are also called ascending pathways.
34) Which accurately describes sensory and motor pathways?
A) Sensory pathways terminate in the brain, and motor pathways terminate at effectors.
B) Both sensory and motor pathways terminate in the brain.
C) Both sensory and motor pathways terminate in the PNS.
D) Sensory pathways terminate at effectors and motor pathways terminate in the brain.
35) Because most pathways decussate, each side of the brain processes information from the ________ side of the body.
A) contralateral
B) ipsilateral
36) ________ pathways have peripheral primary neurons and central secondary and tertiary neurons.
A) Motor
B) Sensory
37) Neurons of the thalamus that are part of sensory conduction pathways are considered
A) primary neurons.
B) secondary neurons.
C) tertiary neurons.
D) quaternary neurons.
38) Information about temperature, proprioception, and pressure from skin, joints, and muscles is conveyed by
A) somatomotor pathways.
B) visceromotor pathways.
C) somatosensory pathways.
D) viscerosensory pathways.
39) Abdominal pain from digestive organs (e.g., from a stomach ulcer) would be conveyed to the brain by way of somatosensory pathways.
40) The axons of primary sensory neurons make synaptic connections with
A) posterior root ganglia of spinal nerves.
B) secondary neurons in the CNS.
C) secondary neurons in the PNS.
D) thalamic neurons.
41) Neurons in the primary somatosensory cortex receive input from tertiary neurons that have their cell bodies residing in the thalamus.
42) The fasciculus cuneatus is part of the
A) anterolateral pathway.
B) spinocerebellar pathway.
C) posterior funiculus–medial lemniscal pathway.
D) lateral spinothalamic tract.
E) fasciculus gracilis.
43) The medial lemniscus is
A) gray matter in the spinal cord that processes information about proprioception and touch.
B) gray matter in the spinal cord that processes information about pain and temperature.
C) white matter in the brainstem that conducts information about proprioception and touch.
D) white matter in the brainstem that conducts information about pain and temperature.
44) In both the anterolateral pathway and the posterior funiculus–medial lemniscal pathway, the axons of the ________ neurons decussate in the CNS.
A) primary
B) secondary
C) tertiary
D) quaternary
45) Information about pain and temperature is conveyed to the brain by way of the
A) posterior funiculus–medial lemniscal pathway.
B) spinocerebellar pathway.
C) anterolateral pathway.
D) fasciculus gracilis.
E) tectospinal tract.
46) The anterior spinocerebellar tract conducts signals about
A) pain from the upper limbs.
B) pain from the lower limbs.
C) proprioception from the upper limbs.
D) proprioception from the lower limbs.
47) The spinocerebellar pathway is an ascending somatosensory pathway.
48) Some motor pathways originate in the cerebellum.
49) The cell bodies of lower motor neurons are housed in the posterior horns of the spinal cord.
50) The neurons that directly innervate skeletal muscles are called
A) first-order neurons.
B) second-order neurons.
C) upper motor neurons.
D) lower motor neurons.
51) The function of upper motor neurons is to
A) directly excite skeletal muscle cells.
B) excite or inhibit skeletal muscle cells.
C) excite or inhibit lower motor neurons.
D) excite motor portions of the thalamus.
E) excite or inhibit motor portions of the cerebral cortex.
52) Motor neurons that innervate the head and neck are located in the motor nuclei of cranial nerves and in the reticular formation.
53) Lower motor neurons are always excitatory.
54) The direct motor pathway originates in the
A) motor cortex of the cerebral cortex.
B) superior colliculus of the midbrain.
C) vestibular nuclei of the brainstem.
D) reticular formation of the brainstem.
55) The lateral corticospinal tracts include a ________ of the upper motor neuron axons that pass through the medulla, and they govern control of ________.
A) majority; axial muscles
B) majority; muscles used for finely controlled movements
C) minority; axial muscles
D) minority; muscles used for finely controlled movements
56) The tectospinal tract is part of the medial pathway, which is an indirect motor pathway.
57) Axons of the corticobulbar tracts
A) descend in the lateral funiculus of the spinal cord and synapse with anterior horn motor neurons.
B) descend in the anterior funiculus of the spinal cord and synapse with lateral horn motor neurons.
C) do not pass through the spinal cord, as they synapse with lower motor neurons in brainstem cranial nuclei.
D) do not pass through the spinal cord, as they synapse with cerebellar Purkinje cells.
E) connect the supplementary motor cortex with the primary motor cortex.
58) Axons of the anterior corticospinal tracts decussate in the medulla.
59) Motor pathways are ________ tracts that control ________.
A) ascending; affectors
B) ascending; effectors
C) descending; affectors
D) descending; effectors
60) Which of the rami is much smaller than the other?
A) The anterior ramus
B) The posterior ramus
61) Which are not spinal nerve branches?
A) Rami communicantes
B) Posterior rami
C) Anterior rami
D) Lateral rami
62) A posterior root contains
A) sensory axons only.
B) motor axons only.
C) a mix of sensory and motor axons.
D) autonomic nervous system axons.
63) Which of the following structures is closest to the spinal cord?
A) Posterior ramus
B) Posterior root ganglion
C) Posterior rootlets
D) Posterior root
64) The third cervical spinal nerve exits the vertebral column through the
A) intervertebral foramen between C2 and C3 vertebrae.
B) intervertebral foramen between C3 and C4 vertebrae.
C) transverse foramen of C3 vertebra.
D) vertebral canal of vertebrae C2, C3, and C4.
65) The second thoracic spinal nerve exits the spinal column through the
A) vertebral canal of vertebrae T1, T2, and T3.
B) sacral hiatus.
C) intervertebral foramen between vertebrae T2 and T3.
D) intervertebral foramen between vertebrae T1 and T2.
66) A specific segment of skin supplied by a single spinal nerve is a ________.
67) If a patient experiences numbness in the boundaries of a dermatome, it is suggestive of damage to
A) the somatosensory cortex.
B) the thalamus.
C) one of the spinal funiculi.
D) the anterior horn of grey matter in the spinal cord.
E) a spinal nerve.
68) The posterior ramus of a typical spinal nerve innervates the
A) deep muscles of the back and the skin of the back.
B) major thoracic and abdominal organs.
C) abdominal wall.
D) anterior and lateral trunk and the limbs.
E) special senses.
69) The anterior ramus of a typical spinal nerve innervates the
A) deep muscles of the back and the skin of the back.
B) major thoracic and abdominal organs.
C) abdominal wall.
D) anterior and lateral trunk and the limbs.
E) special senses.
70) A network of interwoven anterior rami of spinal nerves is a
A) ramus.
B) communicans.
C) ganglion.
D) dermatome.
E) plexus.
71) The anterior rami of T1–T11 are called
A) dorsal plexuses.
B) anterior plexuses.
C) intercostal nerves.
D) brachial nerves.
E) cervical nerves.
72) The plexuses that lie on either side of the neck are the ________ plexuses.
A) cervical
B) brachial
C) lumbar
D) radial
E) mandibular
73) If a person suffers a thorax-crushing injury and is unable to breathe properly, you would suspect that this nerve was damaged.
A) Transverse cervical nerve
B) Accessory nerve
C) Phrenic nerve
D) Sciatic nerve
E) Greater auricular nerve
74) The cervical plexus is formed by the
A) posterior rami of spinal nerves C2–C6.
B) posterior rami of spinal nerves C4–C8.
C) anterior rami of spinal nerves C1–C4.
D) anterior rami of spinal nerves C3–C7.
E) rami communicantes of spinal nerves C1–C7.
75) The plexus that supplies the upper limbs is the ________ plexus.
A) cervical
B) brachial
C) bronchiole
D) lumbar
E) sciatic
76) Which spinal nerves contribute to the brachial plexus?
A) S1–Co1
B) L1–L5
C) C5–T1
D) L4–S4
E) C1–C5
77) Which of the following lists the components of the brachial plexus in correct order starting with the most medial?
A) Cords, divisions, nerves, rami
B) Rami, divisions, cords, trunks
C) Trunks, divisions, rami, cords
D) Ganglia, rami, nerves, terminals
E) Rami, trunks, divisions, cords
78) Within the axilla, axons of neurons are organized within
A) three cords—the posterior, medial, and lateral cords.
B) three divisions—the superior, middle, and inferior divisions.
C) five cords—the superior, inferior, medial, lateral, and middle divisions.
D) five divisions—proximal, distal, ulnar, median, and radial divisions.
79) The nerve that innervates the deltoid muscle and receives sensory input from the superolateral arm is the
A) axillary nerve.
B) musculocutaneous nerve.
C) median nerve.
D) radial nerve.
E) ulnar nerve.
80) Following an injury to his arm, a patient complains that he has no sensations from the thumb, index finger, middle finger, and part of the ring finger. What nerve do you suspect to be damaged?
A) Median nerve
B) Radial nerve
C) Musculocutaneous nerve
D) Ulnar nerve
E) Axillary nerve
81) Following an injury to his arm, a patient complains that he has lost the ability to flex his elbow and supinate his forearm. Which nerve do you suspect he has damaged?
A) Median nerve
B) Radial nerve
C) Musculocutaneous nerve
D) Ulnar nerve
E) Axillary nerve
82) Following an injury to his arm, a patient complains that he cannot extend the forearm, wrist, and digits. You suspect that he has damaged the
A) median nerve.
B) radial nerve.
C) musculocutaneous nerve.
D) ulnar nerve.
E) axillary nerve.
83) Following an injury to his arm, a patient complains that he has no sensations from his "pinky." You suspect that he has damaged the
A) median nerve.
B) radial nerve.
C) musculocutaneous nerve.
D) ulnar nerve.
E) axillary nerve.
84) A person suffering from carpal tunnel syndrome has lost function of the
A) median nerve.
B) radial nerve.
C) musculocutaneous nerve.
D) ulnar nerve.
E) axillary nerve.
85) Two of the nerves of the lumbar plexus are the
A) femoral and sciatic nerves.
B) femoral and obturator nerves.
C) obturator and pudendal nerves.
D) pudendal and sciatic nerves.
86) The nerve responsible for innervation (movement) of the quadriceps femoris muscle is the ________ nerve.
A) femoral
B) sciatic
C) obturator
D) genitofemoral
E) tibial
87) The obturator nerve innervates muscles of the lateral thigh.
88) The largest and longest nerve in the body is the ________ nerve.
A) femoral
B) radial
C) sciatic
D) obturator
E) saphenous
89) This nerve helps to plant the foot and receives sensory signals from the skin of the sole.
A) Femoral nerve
B) Deep fibular nerve
C) Obturator nerve
D) Genitofemoral nerve
E) Tibial nerve
90) The spinal nerves that give rise to the sacral plexus are
A) L4-S4.
B) T11-Co1.
C) L2-S1.
D) S4-C2.
91) Where the sciatic nerve splits, it branches directly to the
A) deep and superficial fibular nerves.
B) tibial and common fibular nerves.
C) femoral and obturator nerves.
D) deep femoral and tibial nerves.
E) popliteal and sural nerves.
92) Reflexes are described as
A) slow and spontaneous.
B) spontaneous and self-initiating.
C) pre-programmed and voluntary.
D) rapid and involuntary.
93) Usually, awareness of the stimulus occurs before a reflex action has been initiated.
94) What is the correct order for the events that occur during a reflex?
a: Impulse travels through sensory neuron to the CNS
b: A stimulus activates a receptor
c: Information is processed by interneurons
d: Motor neuron transmits impulse to effector
e: Effector responds
A) a, b, c, d, e
B) b, a, c, d, e
C) c, b, a, e, d
D) c, a, b, d, e
E) b, d, c, a, e
95) A reflex arc in which both the receptor and the effector organs of the reflex are on the same side of the spinal cord is
A) monosynaptic.
B) polysynaptic.
C) ipsilateral.
D) contralateral.
E) None of the choices is correct.
96) Late one night you are leaving the science building during a snowstorm. As you approach your car, your right foot suddenly slips on a patch of ice. Your left leg immediately stiffens as you try to regain your balance. The reflex action you relied upon is a(n)
A) unilateral reflex.
B) ipsilateral reflex.
C) contralateral reflex.
D) voluntary reflex.
E) None of the choices is correct.
97) Which type of reflex occurs with the smallest delay?
A) Polysynaptic
B) Monosynaptic
98) The simple knee-jerk reflex is an example of a(n) ________ reflex.
A) ipsilateral
B) contralateral
C) monosynaptic
D) crossed-extensor
E) multisynaptic
99) Stepping on a piece of glass would most likely invoke a ________ reflex.
A) Golgi tendon
B) withdrawal
C) stretch
D) pain
E) motor
100) If someone steps on a sharp object with their right foot, it will lead to
A) polysynaptic reflexes involving contraction of the right hamstring and left quadriceps.
B) polysynaptic reflexes involving contraction of the right quadriceps and left hamstrings.
C) a monosynaptic reflex causing contraction of the right hamstring and a polysynaptic reflex causing contraction of the left hamstring.
D) a monosynaptic reflex causing contraction of the right quadriceps and a polysynaptic reflex causing contraction of the the left hamstring.
101) For many reflexes, including the stretch reflex, the excitation of a muscle leads to
A) excitation of all motorneurons that are contralateral.
B) inhibition of motor neurons of its antagonist.
C) inhibition of motor neurons of its synergist.
D) excitation of motor neurons of the antagonist.
E) inhibition of sensory neurons that initiate the reflex.
102) The Golgi tendon reflex
A) helps to overcome pain.
B) aids in sending sensory information to the muscles.
C) prevents skeletal muscles from tensing excessively.
D) prevents muscles from contracting.
E) helps to gain balance through a complex series of muscular contractions.
103) A monosynaptic reflex that monitors and regulates skeletal muscle length is a ________ reflex.
A) withdrawal
B) flexor
C) Golgi tendon
D) stretch
E) hypoactive
104) A diminished reflex response that may indicate damage to a segment of the spinal cord is a(n) ________ reflex.
A) hypoactive
B) hyperactive
C) diminutive
D) ponderous
E) excessive
105) Clonus often accompanies a ________ reflex after damage has occurred to the brain.
A) cremaster
B) pupillary
C) hypoactive
D) hyperactive
106) When the Achilles tendon is tapped or the bottom of the foot is stroked, the reflexive response is that the foot
A) plantar flexes.
B) dorsiflexes.
C) inverts.
D) everts.
107) The embryonic feature that gives rise to the anterior and lateral horns of gray matter is the ________ plate.
A) basal
B) alar
C) ulnar
D) anterior
E) posterior
108) The alar plate of the embryo develops into the gray commissure of the spinal cord.
109) The adult spinal cord extends inferiorly from the brain through the vertebral canal and ends at the level of the ________ vertebra.
A) S4
B) L1
C) L6
D) S1
E) T8
110) The nerves projecting inferiorly from the spinal cord are collectively called the
A) terminal finale.
B) cauda equina.
C) terminus filus.
D) caudal terminale.
E) caudus finalis.
111) The cell bodies of sensory neurons are located in the
A) posterior root ganglion.
B) anterior funiculus.
C) gray commissure.
D) anterior horn.
E) posterior funiculus.
112) Which of these spinal nerve counts is incorrect?
A) Thoracic nerves = 8 pairs
B) Cervical nerves = 8 pairs
C) Lumbar nerves = 5 pairs
D) Sacral nerves = 5 pairs
E) Coccygeal nerves = 1 pair
113) This figure shows a cross section of a vertebra and the spinal cord. What structure does number 1 indicate?
A) Epidural space
B) Pia mater
C) Subarachnoid space
D) Central canal
E) Dura mater
114) This figure shows the spinal cord and spinal nerves. What structure does number 1 indicate?
A) Dura mater
B) Filum terminale
C) Cauda equina
D) Conus medullaris
E) Posterior rootlets
115) This figure shows the spinal cord and spinal nerves. What structure does number 2 indicate?
A) Dura mater
B) Filum terminale
C) Cauda equina
D) Conus medullaris
E) Posterior rootlets
116) This figure shows the spinal cord and spinal nerves. What structure does number 3 indicate?
A) Cervical plexus
B) Brachial plexus
C) Cervical enlargement
D) Lumbosacral enlargement
E) Sacral plexus
117) This figure shows an anterior view of the spinal cord and meninges. What structure does number 1 indicate?
A) Anterior root
B) Posterior root
C) Anterior root ganglion
D) Posterior root ganglion
E) Gray commissure
118) This figure shows an anterior view of the spinal cord and meninges. What structure does number 3 indicate?
A) Arachnoid
B) Pia mater
C) Dura mater
D) Gray matter
E) White matter
119) This figure shows a cross section of the spinal cord. What structure does number 1 indicate?
A) Lateral horn
B) Anterior horn
C) Gray commissure
D) Posterior horn
E) Posterior funiculus
120) This figure shows a cross section of the spinal cord. What structure does number 2 indicate?
A) Lateral horn
B) Anterior horn
C) Gray commissure
D) Posterior horn
E) Posterior funiculus
121) This figure shows a cross section of the spinal cord. What structure does number 3 indicate?
A) Posterior funiculus
B) White commissure
C) Anterior funiculus
D) Lateral funiculus
E) Anterior median fissure
122) This figure shows a cross section of the spinal cord. What structure does number 4 indicate?
A) Posterior median sulcus
B) White commissure
C) Anterior funiculus
D) Lateral funiculus
E) Anterior median fissure
123) This figure shows neuron pathways and nuclei locations. What type of nuclei does number 1 indicate?
A) Somatic motor nuclei
B) Autonomic motor nuclei
C) Visceral sensory nuclei
D) Somatic sensory nuclei
E) None of the choices is correct
124) This figure shows neuron pathways and nuclei locations. What type of nuclei does number 2 indicate?
A) Somatic motor nuclei
B) Autonomic motor nuclei
C) Visceral sensory nuclei
D) Somatic sensory nuclei
E) None of the choices is correct.
125) This figure shows spinal nerve branches. What structure does number 1 indicate?
A) Anterior ramus
B) Posterior ramus
C) Rami communicantes
D) Sympathetic trunk ganglion
E) Posterior root ganglion
126) This figure shows spinal nerve branches. What structures are indicated by number 4?
A) Anterior rami
B) Posterior rami
C) Rami communicantes
D) Sympathetic trunk ganglia
E) Posterior root ganglia
127) In the brain, the outer cerebral cortex consists of gray matter, but in the spinal cord, gray matter is confined to the innermost regions.
128) In general, nerves from the posterior division of the brachial plexus tend to innervate muscles that extend the parts of the upper limb.
129) A monosynaptic response is one that does not involve an interneuron.
130) If someone sustained damage to the left side of their spinal cord at the T2 level such that both the anterolateral pathway and the posterior funiculus were severed on the left side only, what sensory deficits would exist in the left and right lower limbs?
131) The spinal cord exhibits some reflexes that do not involve the brain.
132) The spinal cord relays both sensory and motor information between the CNS and rest of the body.
133) There are seven cervical vertebrae but eight cervical spinal nerves.
134) The lumbar region of the spinal cord is closest to the lumbar vertebrae of the vertebral column.
135) Sensory impulses traveling through the posterior root will reach the ________ upon entering the spinal cord.
A) posterior horn
B) anterior horn
C) central commissure
D) posterior root ganglion
136) Motor impulses destined for skeletal muscle will leave the spinal cord through the ________ before passing through a spinal nerve.
A) posterior horn
B) anterior root
C) central canal
D) posterior root ganglion
137) In the spinal cord, white matter surrounds (is external to) the gray matter.
138) Nerve plexuses are networks of interweaving posterior rami of spinal nerves.
139) What is a likely result of damage to the phrenic nerve?
A) Loss of motor control of the thoracic diaphragm.
B) Inability to flex the elbow
C) Lack of sensation from the anterior thigh
D) Inability to flex the torso
140) The femoral nerve arises from which nerve plexus?
A) Lumbar
B) Sacral
C) Brachial
D) Cervical
141) The sciatic nerve arises from which nerve plexus?
A) Lumbar
B) Sacral
C) Brachial
D) Cervical
142) The common fibular nerve originated from which nerve plexus?
A) Lumbar
B) Sacral
C) Brachial
D) Cervical
143) In a common reflex arc, after a sensory nerve signal is processed by interneurons in the integration center, where does the signal go next?
A) Motor neuron
B) Sensory neuron
C) Sensory receptor
D) Effector
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Anatomy Integrative Approach 3e Complete Test Bank
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