Chapter 13 Practice Quiz

25 July 2022
4.7 (114 reviews)
94 test answers

Unlock all answers in this set

Unlock answers (90)
question
Which of the following is a characteristic of both spinal and cranial nerves?
answer
They contain bundles of axons.
question
Which of the following are groups of neuronal cell bodies that are located within the ANS?
answer
ganglia nuclei
question
Which division detects stimuli of the general senses and special senses?
answer
somatic sensory division
question
The sympathetic nervous system and parasympathetic nervous system are divisions of the:
answer
visceral motor division (or autonomic nervous system, ANS
question
What connective tissue sheath wraps the axon of a neuron?
answer
endoneurium
question
Cranial nerve V is the __________.
answer
trigeminal nerve
question
Cranial nerve IV is the __________.
answer
trochlear nerve
question
Which cranial nerve is generally thought of as a mixed nerve?
answer
glossopharyngeal nerve (IX)
question
Which cranial nerve detects smell?
answer
olfactory nerve (I)
question
Which of the following parts of a spinal nerve carries sensory information only?
answer
posterior (dorsal) root
question
Which plexus provides motor and sensory innervation to the upper limb?
answer
brachial plexus
question
Predict what might happen if a disease caused the axons of the first-order somatosensory neurons that transmit proprioceptive stimuli to lose their myelin sheaths.
answer
Lack of coordination during walking would be present.
question
Mechanoreceptors detect __________.
answer
vibration and deep pressure
question
The receptors for smell and taste are __________.
answer
chemoreceptors
question
Mechanoreceptors might detect which of the following sensations?
answer
pressure
question
What part of the nervous system integrates and interprets information from PNS sensory neurons?
answer
central nervous system (CNS)
question
Place the following steps in order for motor control. 1. Upper motor neurons stimulate lower motor neurons. 2. Sensory information is relayed back to the cerebellum so movement can be modified if needed. 3. Upper motor neurons in the premotor cortex select a motor program. 4. Lower motor neurons stimulate a skeletal muscle to contract. 5. The basal nuclei enable the thalamus to stimulate upper motor neurons of the primary cortex.
answer
3, 5, 1, 4, 2
question
This reflex arc shows a __________.
answer
monosynaptic reflex
question
Reflexes that control skeletal muscle are called __________.
answer
somatic
question
The patellar reflex is a type of __________.
answer
stretch reflex
question
Compared to chemical synapses, electrical synapses:
answer
offer faster cell-cell communication
question
What is NOT true of muscle spindles?
answer
Muscle spindles are found within tendons.
question
Which cranial nerve originates as two separate nerves that share a common epineurium, but fuse together after they leave the temporal bone?
answer
Vestibulocochlear (VIII)
question
The vagus nerve is represented by Roman numeral __________.
answer
X
question
Axons of these cranial nerves pass through the cribriform foramina of the ethmoid bone.
answer
Olfactory nerve (I)
question
What extraocular muscle does the trochlear nerve (IV) innervate?
answer
Superior oblique muscle
question
What nerve stimulates the masseter and temporalis muscles to elevate the mandible during mastication and swallowing?
answer
Trigeminal (V) nerve
question
What connects the upper motor neurons to lower motor neurons?
answer
Interneurons
question
Bell's palsy affects the __________ nerve.
answer
facial nerve
question
The ________ innervates the throat, anterior neck, and almost all of the thoracic and abdominal viscera.
answer
vagus nerve (X)
question
Which is not a primary function of the oculomotor nerve (III)?
answer
Dilates the pupil
question
Which nerve innervates most of the intrinsic and extrinsic muscles of the tongue?
answer
Hypoglossal nerve (XII)
question
The optic nerve is represented by Roman numeral __________.
answer
II
question
What two nerves do not arise from the brain stem?
answer
Olfactory and optic nerves
question
Where are the sensory neurons found in a spinal nerve?
answer
Posterior root of spinal nerve
question
The ______________ of the peripheral nervous sytems consists of lower motor neurons that directly innervate skeletal muscle fibers.
answer
somatic motor division
question
Which is not a motor function of the facial nerve?
answer
Responsible for swallowing movements
question
What is the connective tissue sheath that surrounds a peripheral nerve?
answer
Epineurium
question
Which branch is not part of the trigeminal nerve?
answer
Buccal nerve
question
The sympathetic nervous system and parasympathetic nervous system are divisions of the __________.
answer
visceral motor division (autonomic nervous system)
question
Which of the following cranial nerves contain axons of motor neurons?
answer
Trochlear nerve (IV)
question
What nerve stimulates the masseter and temporalis muscles to elevate the mandible during mastication and swallowing?
answer
Trigeminal (V) nerve
question
Which nerve has the sensory functions of taste in the posterior one-third of the tongue and detecting changes in blood pressure of the carotid artery?
answer
Glossopharyngeal nerve (IX)
question
What nerve is unique in that it has a spinal origin?
answer
Accessory nerve (XI)
question
Which of the following houses motor neurons?
answer
anterior root of spinal nerve
question
Where does the motor portion of the facial nerve (VIII) originate?
answer
Nuclei in the pons and medulla
question
Which somatic motor neuron innervates the lateral rectus muscle?
answer
Abducens nerve (VI)
question
Bundles of axons within a nerve are known as __________.
answer
fascicles
question
What nerve causes the painful tingling sensation when you hit your "funny bone"?
answer
Ulnar nerve
question
Which nerve innervates the deltoid and teres minor muscles and the skin over the deltoid?
answer
Axillary nerve
question
Which of the following nerves does not originate from the sacral plexus?
answer
Obturator nerve
question
A receptor potential _______________________.
answer
leads to an action potential if the stimulus is strong enough
question
Visceral pain may be perceived as cutaneous pain, a phenomenon known as __________.
answer
referred pain
question
Which of the following events is not a step in the pathway for detection and perception of somatic sensation?
answer
The central process transmits the action potential to the peripheral nervous system (PNS).
question
Which component of a somatic sensory neuron transmits an action potential from the peripheral process to the posterior horn?
answer
Central process
question
What receptors would detect a temperature of 52Ā°C?
answer
Nociceptors
question
Ms. Carroll went to her doctor's office with pain in her right shoulder blade and learned she was having a gallbladder attack. You're not surprised to hear about the unusual location of her pain since it is known as __________.
answer
referred pain
question
What is the largest and longest nerve of the body?
answer
sciatic nerve
question
Sensory transduction occurs in __________.
answer
PNS sensory neurons
question
_____________ are sensory receptors accociated with pain.
answer
Nociceptors
question
During a boxing match, Sammy was hit on the side of the neck. He stopped breathing temporarily due to damage to the __________.
answer
cervical plexus
question
Which of the following is incorrect about the numbers of spinal nerves?
answer
7 pairs of cervical spinal nerves
question
Which of the following characteristics is not true about receptive fields?
answer
More sensory neurons equal larger receptive fields per neuron.
question
What mechanoreceptor is activated by high-frequency vibratory stimuli and deep pressure?
answer
Lamellated corpuscles
question
Merkel cell fibers, tactile corpuscles, Ruffini endings, and lamellated corpuscles are all types of ______________.
answer
mechanoreceptors
question
Which of the following nerves does not originate from the brachial plexus?
answer
Phrenic nerve
question
The _________ nerve is the largest nerve from the posterior division, and of the lumbar plexus.
answer
femoral
question
A network of nerves is known as a __________.
answer
plexus
question
Regions of skin supplied by a spinal nerve for somatic sensation are known as __________.
answer
dermatomes
question
What sensors are located in the musculoskeletal system and detect the movement and position of a joint or body part?
answer
Proprioceptors
question
What sensory receptor is responsible for detecting the hydrogen ion concentration in the body's fluids?
answer
Chemoreceptor
question
____________ detect an object's texture, temperature, and color.
answer
Exteroceptors
question
Photoreceptors are found only in the __________.
answer
eye
question
The speed of nerve impulse transmission through the axon of a sensory neuron will be quickest in __________.
answer
a large-diameter, myelinated axon
question
Which of the following reflexes is not a somatic reflex?
answer
Meissner reflex
question
Which of the following complements the flexion (withdrawal) reflex?
answer
Crossed-extension reflex
question
What reflex is caused by stimulation of nociceptors?
answer
Flexion reflex
question
The small lower motor neurons that innervate intrafusal muscle fibers that are part of specialized stretch receptors are called _____________.
answer
g-motor neurons
question
What reflex is critical in keeping you upright when you're standing?
answer
Patellar reflex
question
What reflex causes muscle relaxation?
answer
Golgi tendon reflex
question
An injury to somatic sensory neurons that decreases or eliminates sensation, including pain, in the affected part of the body is called ________________
answer
sensory peripheral neuropathy.
question
The lower motor neurons that innervate contractile skeletal muscle fibers are called ________
answer
a-motor neurons.
question
A reflex with a single synapse between the sensory and motor neurons within the spinal cord is known as a __________.
answer
monosynaptic reflex
question
What type of sensory receptors are muscle spindles and Golgi tendon organs?
answer
Mechanoreceptor
question
Which of the following symptoms is characterized by extending the big toe and spreading out the other toes when the bottom of the foot is stroked on a patient with an upper motor neuron disorder?
answer
Babinski sign
question
Motor neuron pools consist of __________.
answer
lower motor neurons
question
What causes you to automatically blink when something touches your eye unexpectedly?
answer
Corneal blink reflex
question
______________ detect the degree to which a muscle is stretched.
answer
Muscle spindles
question
What disease affects both the upper and lower motor neurons and typically results in death within 5 years of disease onset?
answer
Amyotrophic lateral sclerosis (ALS)
question
Muscle groups that produce fine movements, like the extrinsic eye muscles, have _________ of muscle spindles compared to muscle groups that produce course movements.
answer
a large number
question
When the visceral sensory nerve endings of the glossopharyngeal nerve in the posterior throat are stimulated, unilaterally it triggers a _________________
answer
gag reflex.
question
Which of the following statements best describes the structure of a Golgi tendon organ?
answer
It consists of an encapsulated bundle of collagen fibers attached to about 20 extrafusal muscle fibers.
question
____________ detect the force generated by a muscle contraction.
answer
Golgi tendon organs
question
Which of the following must occur first in a reflex arc?
answer
Detection by a receptor and delivery of stimulus