Chapter 17 MCQB

294) In what region of the spinal cord is there the most white matter? a) Cervical b) Coccygeal c) Sacral d) Lumbar e) Thoracic

a) Cervical

279) The adult spinal cord extends from the _____ of the brain inferiorly to the superior border of the _____ lumbar vertebra. a) Medulla oblongata, second b) Medulla oblongata, fourth c) Midbrain; first d) Pons; third

a) Medulla oblongata, second

297) Which of the following statements is FALSE for spinal nerves? a) The two largest branches of a spinal nerve are the anterior (dorsal) ramus and the posterior (ventral) ramus. b)every pair of signal nerves exits through the intervertebral formina above the vertebra that has the same name and number as the nerves c) The outer covering of a spinal nerve is the epineurium. d) All spinal nerves are mixed nerves. e) A and B

a) The two largest branches of a spinal nerve are the anterior (dorsal) ramus and the posterior (ventral) ramus.

280) The cervical enlargement is a bulge in the spinal cord containing cell bodies of motor neurons supplying the upper limb. a) True b) False

a) True

286) The posterior median sulcus is a shallow groove on the dorsal side of the spinal cord. a) True b) False

a) True

339) The sciatic nerve is composed of two nerves. One of them is the common fibular (peroneal). a) True b) False

a) True

343) The two main routes for motor information traveling down the spinal cord are _____ pathways and _____ pathways. a) direct, indirect b) corticospinal, posterior column c) anterior spinocerebellar, posterior spinocerebellar d) gracilis fasciculus, cuneate fasciculus

a) direct, indirect

287) The central canal of the spinal cord is located in the center of the: a) gray commissure. b) anterior (ventral) white commissure. c) anterior (ventral) gray horns. d) posterior (dorsal) white columns.

a) gray commissure.

338) The sciatic nerve is composed of two nerves. One of them is the: a) tibial b) posterior femoral cutaneous c) inferior gluteal d) pudendal

a) tibial

298) A nerve is a structure that may contain: 1. axons 2. blood vessels 3. neuron cell bodies 4. connective tissue 5. myelin 6. oligodendrocytes a) 1, 4, 5 b) 1, 2, 4, 5 c) 1, 3, 5, 6 d) 2, 3, 4 e) 1, 2, 3

b) 1, 2, 4, 5

344) A typical reflex arc involves the following components: 1. sensory neuron 2. motor neuron 3. sensory receptor 4. integrating center 5. effector The correct order is: a) 3, 2, 1, 5 b) 3, 1, 4, 2, 5 c) 3, 4, 1, 2, 5 d) 3, 4, 2, 5 e) 2, 1, 4, 3

b) 3, 1, 4, 2, 5

278) The denticular ligaments are an extension of the dura mater, which attach it to the arachnoid mater. a) True b) False

b) False

281) The lumbar enlargement is a bulge in the spinal cord at L1-L5. a) True b) False

b) False

285) The white commissure connects the right and left halves of gray matter in the spinal cord. a) True b) False

b) False

307) Which spinal nerve ramus has branches that serve the deep muscles and skin of the back? a) Anterior (ventral) rami b) Posterior (dorsal) rami c) Rami communicantes

b) Posterior (dorsal) rami

314) The _____ plexus serves the skin and muscles of the head, neck, and superior part of the shoulders and chest. a) lumbar b) cervical c) brachial d) thoracic

b) cervical

272) What is the best description of the epidural space? a) between dura mater and arachnoid mater b) contains a protective cushion of fat and connective tissue c) between arachnoid mater and pia mater d) contains interstitial fluid e) contains cerebrospinal fluid

b) contains a protective cushion of fat and connective tissue

271) The spinal cord is NOT protected by which of the following? a) vertebral column b) cranial bones c) meninges d) cerebrospinal fluid e) A and B

b) cranial bones

330) Select the structure(s) served by the axillary nerve. a) flexors of the wrist b) deltoid muscle c) extensors of the wrist d) biceps brachii e) diaphragm

b) deltoid muscle

333) Select the muscle(s) served by the femoral nerve. a) tibialis anterior and fibularis (peroneal) muscles b) extensor muscles of knee joint c) adductor muscles of thigh d) gluteus maximus e) gastrocnemius and soleus muscles

b) extensor muscles of knee joint

284) The inferior extension of the pia mater that anchors the spinal cord to the coccyx is called the _____. a) cauda equina b) filum terminale c) denticulate ligament d) conus medullaris e) none of the above

b) filum terminale

315) Which of the following is NOT a correct description of the location of the brachial plexus? a) extends inferiorly and laterally on either side of the last few cervical and first thoracic vertebrae b) on the neck alongside the first four cervical vertebrae c) passes above the first rib posterior to the clavicle d) enters the axilla

b) on the neck alongside the first four cervical vertebrae

345) Which of the following could serve as an effector for a somatic reflex? a) gland. b) skeletal muscle. c) smooth or cardiac muscle. d) all of these choices

b) skeletal muscle.

276) Cerebrospinal fluid is found between two layers of the meninges, in a space called the _____. a) subdural space b) subarachnoid space c) subpial space d) epidural space

b) subarachnoid space

283) The roots of which spinal nerves make up the cauda equina? 1. Thoracic 2. Lumbar 3. Sacral 4. Coccygeal a) 1, 2, 3, 4 b) 3 & 4 c) 2, 3, 4 d) 4 e) 2 & 3

c) 2, 3, 4

296) There are _____ pairs of spinal nerves, consisting of the following groups: _____ pairs of cervical, _____ pairs of thoracic, _____ pairs of lumbar, _____ pairs of sacral, and _____ pair of coccygeal spinal nerves. a) 31, 7, 12, 5, 5, 1 b) 41, 8, 13, 6, 6, 2 c) 31, 8, 12, 5, 5, 1 d) 24, 9, 10, 4, 5, 3

c) 31, 8, 12, 5, 5, 1

334) Select the muscle(s) served by the obturator nerve. a) gastrocnemius and soleus muscles b) anterior muscles of thigh (quadriceps and sartorius) c) adductor muscles of thigh d) gluteus maximus e) tibialis anterior and fibularis (peroneal) muscles

c) adductor muscles of thigh

275) What is the best description of the subarachnoid space? a) contains interstitial fluid b) contains a protective cushion of fat and connective tissue c) between arachnoid mater and pia mater d) between dura mater and the wall of vertebral canal e) between dura mater and arachnoid mater

c) between arachnoid mater and pia mater

312) The main plexuses formed by the anterior (ventral) rami of spinal nerves are: a) thoracic, lumbar, sacral, and coccygeal b) cervical, lumbar, sacral, and coccygeal. c) cervical, brachial, lumbar, and sacral. d) cervical, lumbar, sacral, and inguinal.

c) cervical, brachial, lumbar, and sacral.

274) What is the best description of the arachnoid mater? a) meninx closest to the bone of the vertebral column b) between subarachnoid space and pia mater c) consists of collagen and elastic fiber network; has no blood vessels d) contains a protective cushion of fat and connective tissue e) contains blood vessels that supply oxygen and nutrients to the spinal cord

c) consists of collagen and elastic fiber network; has no blood vessels

277) What is the best description of the pia mater? a) contains a protective cushion of fat and connective tissue b) most superficial meninx c) contains blood vessels that supply oxygen and nutrients to the spinal cord d) thick strong layer composed of dense, irregular connective tissue e) consists of collagen and elastic fiber network; has no blood vessels

c) contains blood vessels that supply oxygen and nutrients to the spinal cord

313) A ________ corresponds to the area of the skin that provides sensory input to the CNS via one pair of spinal nerves. a) sensory tract b) plexus c) dermatome d) cutaneous field e) none of the above

c) dermatome

332) Select the structure(s) served by the median nerve. a) skin of superior portion of the chest and shoulder b) quadriceps femoris muscle c) extensors of the wrist d) flexors of the wrist e) diaphragm

c) extensors of the wrist

336) Select the muscle(s) served by the inferior gluteal nerve. a) anterior muscles of thigh (quadriceps and sartorius) b) adductor muscles of thigh c) gluteus maximus d) gastrocnemius and soleus muscles e) tibialis anterior and fibularis (peroneal) muscles

c) gluteus maximus

342) Motor impulses that help maintain muscle tone and posture are conveyed from the brain through the spinal cord by the: a) direct pathways. b) posterior columns. c) indirect pathways. d) spinothalamic tracts.

c) indirect pathways.

316) Which of the following is NOT a correct description of the location of the lumbar plexus? a) lateral to the first four lumbar vertebrae b) between the two heads of the psoas major muscle c) posterior to the quadratus lumborum muscle d) None of these choices

c) posterior to the quadratus lumborum muscle

340) The two main routes for sensory information traveling up the spinal cord to the brain are _____ tracts and _____ columns. a) direct, indirect b) reticulospinal, vestibulospinal c) spinothalamic, posterior d) corticospinal, corticobulbar e) none of the above

c) spinothalamic, posterior

282) The conus medullaris is: a) the junction between the medulla and the spinal cord. b) the attachment of a spinal nerve to the spinal cord. c) the tapering end of the spinal cord inferior to the lumbar enlargement. d) the inner portion of the spinal cord, seen in cross section.

c) the tapering end of the spinal cord inferior to the lumbar enlargement.

337) Select the muscle(s) served by the common fibular nerve. a) anterior muscles of thigh (quadriceps and sartorius) b) adductor muscles of thigh c) tibialis anterior and fibularis (peroneal) muscles d) gluteus maximus e) gastrocnemius and soleus muscles

c) tibialis anterior and fibularis (peroneal) muscles

331) Select the structure(s) served by the radial nerve. a) skin of superior portion of the chest and shoulder b) deltoid muscle c) triceps brachii d) flexors of the wrist e) diaphragm

c) triceps brachii

273) What is the best description of the dura mater? a) between pia mater and spinal cord b) meninx closest to the bone of the vertebral column c) between arachnoid mater and pia mater d) contains blood vessels that supply oxygen and nutrients to the spinal cord e) consists of collagen and elastic fiber network; has no blood vessels

d) contains blood vessels that supply oxygen and nutrients to the spinal cord

311) Which peripheral nerves are responsible for cutaneous sensation from the skin of the anterior abdominal wall as well as motor innervation to anterior abdominal wall muscles? a) median and musculocutaneous nerves b) inferior and superior gluteal nerves c) sciatic and sural nerves d) intercostal (thoracic) nerves

d) intercostal (thoracic) nerves

341) The senses of pain and temperature are conveyed to the brain by: a) direct tracts. b) indirect tracts. c) posterior columns. d) lateral spinothalamic tracts.

d) lateral spinothalamic tracts.

270) The spinal cord a) is the "highway" for ascending sensory signals and descending motor impulses. b) extends the entire length of the vertebral column. c) contains neural circuits for processing reflexes (quick, automatic responses to stimuli). d) A and B e) A and C

e) A and C

295) In what region of the spinal cord is there the smallest amount of gray matter relative to white matter? a) Cervical b) Coccygeal c) Sacral d) Lumbar e) Thoracic

e) Thoracic

335) Select the muscle(s) served by the tibial nerve. a) tibialis anterior and fibularis (peroneal) muscles b) anterior muscles of thigh (quadriceps and sartorius) c) adductor muscles of thigh d) gluteus maximus e) gastrocnemius and soleus muscles

e) gastrocnemius and soleus muscles

329) Select the structure(s) served by the supraclavicular nerve. a) diaphragm b) quadriceps femoris muscle c) extensors of the wrist d) flexors of the wrist e) skin of superior portion of the chest and shoulder

e) skin of superior portion of the chest and shoulder