Anatomy & Physiology II (EXAM # 1) CH. 13 Homework Questions

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https://session.masteringaandp.com/problemAsset/1000106512/3/13_2.gif Damage to this nerve would cause difficulty in speech. A B C D E

E

https://session.masteringaandp.com/problemAsset/1000106610/4/13_1.gif Spinal nerve. A B C D E

E

Which of the following is a sensory receptor that is stimulated by light touch? Golgi tendon organs Pacinian corpuscles Ruffini's corpuscles Meissner's corpuscles

Meissner's corpuscles

https://session.masteringaandp.com/problemAsset/1000106609/4/13_1.gif Rootlets of the spinal nerve. A B C D E

B

https://session.masteringaandp.com/problemAsset/1000106591/3/13_2.gif Innervates the superior oblique muscle. A B C D E

A

Striking the funny bone may cause injury to a nerve of this plexus. A. Brachial plexus B. Sacral plexus C. Cervical plexus D. Lumbar plexus

A. Brachial plexus

Trauma to a nerve of this plexus may cause wristdrop. A. Brachial plexus B. Sacral plexus C. Cervical plexus D. Lumbar plexus

A. Brachial plexus

CN IX : Glossopharyngeal. A. Motor and sensory B. Motor only C. Sensory only

A. Motor and sensory

CN V: Trigeminal. A. Motor and sensory B. Motor only C. Sensory only

A. Motor and sensory

CN VII: Facial. A. Motor and sensory B. Motor only C. Sensory only

A. Motor and sensory

CN X: Vagus. A. Motor and sensory B. Motor only C. Sensory only

A. Motor and sensory

Receptors located in epithelium of the nasal cavity. A. Olfactory B. Trochlear C. Abducens D. Trigeminal E. Vestibulocochlear F. Vagus G. Accessory

A. Olfactory

Prevents muscle overstretching and maintains muscle tone. A. Stretch B. Deep tendon C. Flexor D. Crossed extensor E. Abdominal F. Plantar

A. Stretch

Controls movement of superior oblique muscle. A. Trochlear B. Facial C. Hypoglossal D. Optic E. Oculomotor F. Trigeminal

A. Trochlear

https://session.masteringaandp.com/problemAsset/1000106593/3/13_2.gif Damage to this nerve would keep the eye from rotating laterally. A B C D E

B

Allows you to smile. A. Trochlear B. Facial C. Hypoglossal D. Optic E. Oculomotor F. Trigeminal

B. Facial

CN XII: Hypoglossal. A. Motor and sensory B. Motor only C. Sensory only

B. Motor only

Improper administration of an injection to the buttocks may injure a nerve of this plexus. A. Brachial plexus B. Sacral plexus C. Cervical plexus D. Lumbar plexus

B. Sacral plexus

https://session.masteringaandp.com/problemAsset/1000106510/3/13_2.gif Longest cranial nerve. A B C D E

C

https://session.masteringaandp.com/problemAsset/1000106631/3/13_1.gif Dorsal root. A B C D E

C

https://session.masteringaandp.com/problemAsset/1000106679/4/13_2.gif Involved in the regulation of breathing. A B C D E

C

Turns the eyeball laterally. A. Olfactory B. Trochlear C. Abducens D. Trigeminal E. Vestibulocochlear F. Vagus G. Accessory

C. Abducens

The phrenic nerve branches from this plexus. A. Brachial plexus B. Sacral plexus C. Cervical plexus D. Lumbar plexus

C. Cervical plexus

Produces a rapid withdrawal of the body part from a painful stimulus; ipsilateral. A. Stretch B. Deep tendon C. Flexor D. Crossed extensor E. Abdominal F. Plantar

C. Flexor

CN I: Olfactory. A. Motor and sensory B. Motor only C. Sensory only

C. Sensory only

https://session.masteringaandp.com/problemAsset/1000106511/3/13_2.gif Damage to this nerve would cause dizziness, nausea, and loss of balance. A B C D E

D

https://session.masteringaandp.com/problemAsset/1000106610/4/13_1.gif Dorsal root ganglion. A B C D E

D

The obturator and femoral nerves branch from this plexus. A. Brachial plexus B. Sacral plexus C. Cervical plexus D. Lumbar plexus

D. Lumbar plexus

Forms a cross pattern called a chiasma. A. Trochlear B. Facial C. Hypoglossal D. Optic E. Oculomotor F. Trigeminal

D. Optic

Checks the integrity of the spinal cord and dorsal rami at the level of T8 to T12. A. Stretch B. Deep tendon C. Flexor D. Crossed extensor E. Abdominal F. Plantar

E. Abdominal

Causes lens shape changes during visual accommodation. A. Trochlear B. Facial C. Hypoglossal D. Optic E. Oculomotor F. Trigeminal

E. Oculomotor

Serves the senses of audition and equilibrium. A. Olfactory B. Trochlear C. Abducens D. Trigeminal E. Vestibulocochlear F. Vagus G. Accessory

E. Vestibulocochlear

Tests both upper and lower motor pathways by stimulating the sole of the foot with a dull instrument extension. A. Stretch B. Deep tendon C. Flexor D. Crossed extensor E. Abdominal F. Plantar

F. Plantar

Has major sensory nerves of the face. A. Trochlear B. Facial C. Hypoglossal D. Optic E. Oculomotor F. Trigeminal

F. Trigeminal

Helps to regulate blood pressure and digestion. A. Olfactory B. Trochlear C. Abducens D. Trigeminal E. Vestibulocochlear F. Vagus G. Accessory

F. Vagus

Formed by the union of a cranial and a spinal root. A. Olfactory B. Trochlear C. Abducens D. Trigeminal E. Vestibulocochlear F. Vagus G. Accessory

G. Accessory

After axonal injury, regeneration in peripheral nerves is guided by ________. Wallerian cells Schwann cells dendrites Golgi organs

Schwann cells

https://session.masteringaandp.com/problemAsset/1000370126/2/Stretch_PartE.jpg Examine and characterize the two motor pathways in the stretch patellar reflex. a. Alpha motor neurons send efferent messages to the quadriceps, while parallel efferent messages to the hamstrings are reduced. b. Interneurons excite alpha motor neurons, which in turn excite the muscle. c. Alpha motor neurons activate the quadriceps. Once the quadriceps have contracted, alpha motor neurons inhibit the hamstrings. d. Alpha motor neurons send efferent messages to excite the quadriceps, and the hamstrings are reduced.

a. Alpha motor neurons send efferent messages to the quadriceps, while parallel efferent messages to the hamstrings are reduced.

Examine the cross section through the lumbar section of the spinal cord and the two patellar reflex pathways shown. What identifies these synapses? a. Both pathways will inhibit muscles. b. Pathways will activate one muscle and simultaneously inhibit its antagonist muscle. c. Efferent impulses synapse twice with motor neurons. d. Both pathways will activate muscles. e. Afferent impulses synapse twice with motor neurons. f. Afferent impulses synapse with motor neurons and interneurons. g. Efferent impulses synapse with motor neurons and interneurons.

b. Pathways will activate one muscle and simultaneously inhibit its antagonist muscle. f. Afferent impulses synapse with motor neurons and interneurons.

https://session.masteringaandp.com/problemAsset/1000370126/2/Stretch_PartB.jpg Select the true statements (more than one) about the characteristics of sensory neurons in the stretch reflex. a. These sensory neurons typically transmit efferent impulses toward antagonist muscles. b. When a stretch activates the muscle spindle, these sensory neurons transmit impulses at a higher frequency. c. These sensory neurons transmit afferent impulses toward the spinal cord (CNS). d. These sensory neurons transmit efferent impulses to antagonist muscles. e. These sensory neurons transmit impulses to the spinal cord via interneurons.

b. When a stretch activates the muscle spindle, these sensory neurons transmit impulses at a higher frequency. c. These sensory neurons transmit afferent impulses toward the spinal cord (CNS).

Which of the following cranial nerves has its neuron cell body located in a site other than the cranial sensory ganglia? cranial nerve VI cranial nerve II cranial nerve IV cranial nerve VII

cranial nerve II

https://session.masteringaandp.com/problemAsset/1000370126/2/Stretch_PartC.png Which is the true statement about the synapses in the spinal cord in the stretch reflex? a. Polysynaptic interneurons first synapse with higher brain centers. b The antagonist muscle is activated by increased frequency stimuli. c Sensory neurons synapse with motor neuron interneurons to excite the extrafusal fibers of the stretched muscle. d Interneurons make inhibitory synapses with neurons that prevent contraction of the antagonist muscle.

d. Interneurons make inhibitory synapses with neurons that prevent contraction of the antagonist muscle.

The back is innervated by the dorsal root of spinal nerves dorsal rami of spinal nerves ventral rami of spinal nerves ventral root of spinal nerves

dorsal rami of spinal nerves

A patient sustains a ventral horn injury to the lumbar region of the spine. This injury has damaged the cell bodies of several afferent nerves within the region. Predict how the patient's patellar reflex might be affected. a. Both the quadriceps and the hamstring would contract. b. The quadriceps would contract, but the hamstring would not relax. c. The hamstring would relax, but the quadriceps would not contract. d. The patient's patellar reflex would be hyperactive. e. The patient's patellar reflex would be absent or weak.

e. The patient's patellar reflex would be absent or weak.

In a crossed-extensor reflex, if the right arm was grabbed it would flex and the left arm would ________. also flex extend abduct adduct

extend

Which of the following reflexes produces a rapid withdrawal of the body part from a painful stimulus (ipsilateral)? crossed-extensor plantar Golgi tendon flexor

flexor

Which nerve is compressed in carpal tunnel syndrome? median axillary radial ulnar

median

A fracture of the ethmoid bone could result in damage to which cranial nerve? glossopharyngeal vagus olfactory accessory

olfactory

Which of the following cranial nerves is purely sensory? trigeminal accessory vagus optic

optic

What level includes cortical and brain stem motor areas? precommand level segmental level projection level none of the above

projection level

Which of the following branches of a spinal nerve contain autonomic motor nerve fibers and is only found in the thoracic region? dorsal root dorsal ramus rami communicantes ventral root

rami communicantes

What kind of reflexes are Golgi tendon organ body receptors involved in? withdrawal reflexes mono synaptic reflexes reciprocal activation reflexes superficial reflexes

reciprocal activation reflexes

Transduction refers to conversion of ________. presynaptic nerve impulses to postsynaptic nerve impulses stimulus energy into energy of a graded potential receptor energy to stimulus energy afferent impulses to efferent impulses

stimulus energy into energy of a graded potential

The patellar "knee jerk" reflex is an example of a(n). ________. extensor thrust reflex stress reflex crossed-extensor reflex stretch reflex

stretch reflex

A reflex that causes muscle relaxation and lengthening in response to muscle tension is called a ________. tendon reflex flexor reflex crossed-extensor reflex plantar reflex

tendon reflex

All processing at the circuit level going up to the perceptual level must synapse in the ________. pons thalamus reticular formation medulla

thalamus

In which vertebral region can you find the Rami communicantes? cervical thoracic sacral lumbar

thoracic

Which of the following is not a nerve plexus? cervical plexus lumbar plexus thoracic plexus brachial plexus

thoracic plexus

Which of the following cranial nerves is not involved with the eye? trochlear oculomotor trigeminal abducens

trigeminal

The cranial nerves that have neural connections with the tongue include all except the ________. trigeminal facial glossopharyngeal trochlear

trochlear


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