Ch. 13 PNS Flashcards
The conversion of the energy of a stimulus into a graded potential is called ?
Transduction
What cranial nerve innervates most of the visceral organs?
Vagus (X)
What cranial nerve only carries motor information?
Abducens (VI)
The Phrenic nerve is a branch from the ____ plexus.
Cervical
The large onion shaped receptors found deep in the dermis and subcutaneous tissue that respond too deep pressure are ?
Lamellar corpuscles
Proprioceptors include all of the following except ?
A) Muscle spindles
B) Tendon organs
C) Epithelial tactile complexes
D) Joint kinesthetic receptors
Epithelial tactile complexes
The aspect of sensory perception by which the cerebral cortex indentifies the site and pattern of stimulation is called ?
Spatial discrimination
Dorsal root ganglia contain ____ ____of sensory neurons.
Cell bodies
What is a pain, itch, and temperature receptor?
Free nerve ending
What receptor discriminates touch in hairless skin?
Tactile corpuscle
What contains receptor endings wrapped around thick collagen bundles?
Tendon organ
What receptor is a rapidly adapting deep pressure receptor?
Lamellar corpuscle
What cranial nerve causes pupillary constriction?
Oculomotor (III)
What cranial nerve is the major sensory nerve of the face?
Trigeminal (V)
What cranial nerve serves the sternocleidomastoid and trapezius muscles?
Accessory (XI)
Which cranial nerves are purely sensory?
Olfactory (I) and Optic (II)
What cranial nerve serves the tongue muscles?
Hypoglossal (XII)
What cranial nerve allows you to chew your food?
Trigeminal (V)
What cranial nerve is impaired in Bell’s Palsy?
Facial (VII)
What cranial nerve helps regulate heart activity?
Vagus (X)
What cranial nerve helps you hear and maintain your balance?
Vestibulocochlear (VIII)
Which cranial nerves contain parasympathetic motor fibers?
Oculomotor (III), Facial (VII), Glossopharyngeal (IX), and Vagus (X)
What nerve innervates the diaphragm?
Phrenic nerve of the cervical plexus
What nerve innervates the posterior muscles of the leg?
Tibial nerve of the sacral plexus
What nerve innervates the anterior thigh muscles?
Femoral nerve of the lumbar plexus
What nerve innervates the medial thigh muscles?
Obturator nerve of the lumbar plexus
What nerve innervates the anterior muscles that flex the forearm?
Musculocutaneous nerve of the brachial plexus
Which nerves innervates the muscles that flex the hand and digits?
Median and Ulnar nerves of the brachial plexus
What nerve innervates the muscles that extend the hand and digits?
Radial nerve of the brachial plexus
What nerve innervates the skin and extensor muscles of the posterior arm?
Radial nerve of the brachial plexus
What nerve innervates the fibularis, tibialis anterior, and toe extensors?
Common fiblar nerve of the sacral plexus
Which nerves innervate the elbow joint?
Median, Musculocutaneous, Radial, and Ulnar nerves
The connective tissue sheath that surrounds a fascicle of nerve fibers is the ?
Perineurium
A ____ reflex causes reciprocal activation of the antagonist muscle.
Tendon
____ reflexes involve a reflex initiated on and affecting the same side.
Ipsilateral
____ reflexes involve a reflex that is initiated on one side of the body and affects the other side.
Contralateral
_____ reflexes consist of an ipsilateral withdrawal reflex and a contralateral extensor reflex that usually aids in maintaining balance.
Crossed-extensor
A reflex that causes muscle relaxation and lengthening in response to muscle contraction is called a ____.
Golgi tendon reflex
Irritation of a major nerve of the ____ plexus may cause hiccups.
Cevical plexus
The “knee jerk” reflex is an example of a ____ reflex.
Stretch
Problems in balance may follow trauma to which nerve?
Vestibulocochlear (VIII)
A drooping eyelid and dilated pupil would most likely indicate a problem with the ____ nerve.
Oculomotor (III)
Ruffini’s end organ is an example of a ____ in the skin.
Mechanoreceptor
Which connective tissue layer directly surrounds individual axons in a nerve?
Endoneurium
Nerves that carry impulses toward the CNS only are ______ nerves.
Afferent
Ganglia associated with ? fibers contain cell bodies of sensory neurons.
Afferent
Ganglia associated with ? fibers mostly contain cell bodies of autonomic motor neurons.
Efferent
Damage to which plexus would result in loss of respiratory function?
Cervical
The Rami Communicantes contain ? nerve fibers.
Autonomic (Visceral)
What role does an interneuron play during the knee-jerk reflex?
Afferent fibers from the stretched extensor muscle synapse to inhibit antagonistic muscles
What reflex is most associated with painful stimuli?
The Flexor, or Withdrawal, reflex causes automatic movement away from a painful stimulus
Neuron type found in the ventral horn.
Efferent
Neuron type found in the dorsal root ganglion.
Afferent
Fiber type found in the ventral root.
Efferent
Fiber type found in the dorsal root.
Afferent
Damage to this fiber type would lead to a loss of sensory function.
Afferent
Damage to this fiber type results in a loss of motor function.
Efferent
What cranial nerve is involved in shrugging the shoulders?
Accessory (XI)
What cranial nerve is involved in smelling a flower?
Olfactory (I)
What cranial nerve raises the eyelids and focuses the lens of the eye?
Oculomotor (III)
What cranial nerve slows the heart and increases motility of the digestive tract?
Vagus (X)
What cranial nerve is involved in smiling?
Facial (VII)
What cranial nerve is involved in chewing gum?
Trigeminal (V)
What cranial nerve is involved in listening to music and seasickness?
Vestibulocochlear (VIII)
What cranial nerve is involved in tasting well-seasoned food?
Facial (VII)
What cranial nerve is involved in feeling a toothache?
Trigeminal (V)
What cranial nerve is involved in reading?
Optic (II)
