Chapter 13 Quiz Questions-Review for Exam

The reflex that prevents a muscle from exerting too much tension is the ________ reflex. a) tendon b) reciprocal c) flexor d) crossed extensor e) stretch

a) tendon

The white matter of the spinal cord contains a) Interneurons. b) Bundles of AXONS that share common origins, destinations, and functions. c) Both axons and dendrites. d) Sensory and motor nuclei. e) Bundles of DENDRITES that share common origins, destinations, and functions.

b) Bundles of AXONS that share common origins, destinations, and functions

A nerve of the cervical plexus that innervates the diaphragm is the ________ nerve. a) lesser occipital b) phrenic c) radial d) ansa cervicalis e) sciatic

b) phrenic

Each of the following nerves is found in the lumbar plexus, except the ________ nerve. a) obturator b) sciatic c) saphenous d) genitofemoral e) femoral

b) sciatic

enlargement of the spinal cord occurs A) near the posterior median sulcus. B) adjacent to the anterior median fissure. C) in those spinal segments that control the limbs. D) in the thoracic region. E) in the sacral region.

C) in those spinal segments that control the limbs.

The outward projections from the central gray matter of the spinal cord are called A) wings. B) horns. C) pyramids. D) fibers. E) tracts.

B) horns.

The dorsal root ganglia contain a) Cell bodies of sensory neurons. b) Axons of motor neurons. c) Axons of sensory neurons. d) Cell bodies of motor neurons. e) Interneurons.

a) Cell bodies of sensory neurons.

The dorsal and ventral roots of each spinal segment unite to form a a) Spinal nerve. b) Cervical enlargement. c) Spinal meninx. d) Spinal ganglion. e) Lumbar enlargement

a) Spinal nerve.

The following are the steps involved in a reflex arc. 1. activation of a sensory neuron 2. activation of a motor neuron 3. response by an effector 4. arrival of a stimulus and activation of a receptor 5. information processing

4.arrival of a stimulus and activation of a receptor 1. activation of a sensory neuron 5. information processing 2. activation of a motor neuron 3. response by an effector

Axons crossing from one side of the spinal cord to the other within the gray matter are found in the A) anterior gray horns. B) lateral gray horns. C) posterior gray horns. D) gray commissures. E) white commissures.

D) gray commissures

The adult spinal cord extends only to which vertebral level? A)Sacral B)Coccyx C)third or fourth lumbar D)first or second lumbar E)last thoracic

D)first or second lumbar

The entire spinal cord is divided into __________ segments. A)25 B)5 C)35 D)12 E)31

E)31

The preganglionic fibers that connect a spinal nerve with an autonomic ganglion in the thoracic and lumbar region of the spinal cord form the a. white rami communicantes b. gray rami communicantes c. dorsal ramus d. ventral ramus e. dermatomes

a. white rami communicantes

The ventral root of a spinal nerve contains a) Interneurons. b) Axons of motor neurons. c) Cell bodies of sensory neurons. d) Axons of sensory neurons. e) Cell bodies of motor neurons

b) Axons of motor neurons

The dorsal root of a spinal nerve contains a) Cell bodies of sensory neurons. b) Axons of sensory neurons. c) Axons of motor neurons. d) Cell bodies of motor neurons. e) Interneurons.

b) Axons of sensory neurons

Muscles of the neck and shoulder are innervated by spinal nerves from the ________ region. a) lumbar b) cervical c) coccygeal d) sacral e) thoracic

b) cervical

The ulnar nerve is found in which plexus? a) lumbar b) cranial c) brachial d) sacral e) cervical

c) brachial

The ventral rami of spinal nerves C5 to T1 form the ________ plexus. a) lumbar b) sacral c) brachial d) thoracic e) cervical

c) brachial

Which of the following pairs is not properly matched? a) thoracic spinal nerves: 12 b) coccygeal spinal nerves: 1 c) lumbar spinal nerves: 4 d) sacral spinal nerves: 5 e) cervical spinal nerves: 8

c) lumbar spinal nerves: 4

Spinal nerves are ________ nerves. a) involuntary b) purely sensory c) mixed d) purely motor e) interneuronal

c) mixed

the spinal cord continues to elongate until about age a. 20 years b. 10 yrs c. 4 yrs d. 6 months e. 2 months

c. 4 yrs

The specialized membranes that surround the spinal cord are termed the a. cranian meninges b. cranial mater c. spinal meninges d. spinal mater e. epidural membranes

c. spinal meninges

Spinal nerves from the sacral region of the cord innervate the ________ muscles. a) shoulder b) facial c) abdominal d) leg e) intercostal

d) leg

The outermost connective tissue covering of spinal nerves is the a) Perineurium. b) Endomysium. c) Endoneurium. d) Epimysium. e) Epineurium.

e) Epineurium

The reflex that complements a withdrawal reflex by making compensatory adjustments on the opposite side of the body receiving the stimulus is the ________ reflex. a) tendon b) reciprocal c) flexor d) stretch e) crossed extensor

e) crossed extensor