Exam 3 Q & A Flashcards
What are the three types of neuroactive substances based on the manner of action? 117.10
neurotransmitters, neuromodulators, neurohormones
What are the unique properties of neurons? 117.8
depolarization, propagation, and transmission of a neural impulse
Based on manner of action, define nuerotransmitter 117.11
a neuroactive substance acting rapidly and locally on a target cell
What is the name given to the major cellular mass of a neuron? 117.14
the body, soma, or perikaryon
What are the basic morphologies of neurons? 117.16
unipolar, bipolar, pseudounipolar, and multipolar neurons
What are the possible locations of bipolar neurons? 118.18
the nasal olfactory epithelium, the retina, the vestibular or Scarpa’s ganglion, and the cochlear or spiral ganglion
What are the possible locations of pseudounipolar neurons? 118.20
any sensory ganglion other than those of the eighth cranial nerve
Where is the primary sensory neuron of a typical sensory pathway located? 118.25
in a sensory ganglion
What is the morphology of most motor or efferent neurons associated with the peripheral nerve system? 118.28
multipolar
What are the three classifications of sensory receptor endings? 119.33
functional specificity, distribution-function and structure or morphology
What do chemoreceptors monitor? 119.35
hypoxia or decreased oxygen levels, hypercapnia or increased carbon dioxide levels and elevated hydrogen ions, an indication of circulating blood pH
What are the types and examples of exteroceptors? 119.42
a) general or cutaneous sense organs such as free nerve endings, encapsulated endings and epidermal endings
b) special sense receptors for olfaction, vision, hearing, and taste
What are the examples of proprioceptors? 119.43
golgi tendon organs, neuromuscular spindles, Pacinian corpuscles, inner ear receptors for equilibrium and specialized receptors in joints
Where will the interoceptors be located? 119.44
in viscera, glands, and blood vessels
which types of encapsulated nerve ending it sensitive to vibration? 120.53
lamellated corpuscles or pacinian corpuscles
What are the primary neuronal projections observed in a nerve? 120.1
peripheral sensory processes and motor nerve fibers
muscles derived from somites are innervated by which cranial nerve? 121.17
cranial nerve III or oculomotor nerve, cranial nerve IV or trochlear nerve, cranial nerve VI or abducens nerve and crainal nerve XII or hypoglossal nerve
muscles derived from the branchial or phayngeal arches are innervated by which cranial nerves? 121.19
cranial nerve V or trigeminal nerve, cranial nerve VII or facial nerve, cranial nerve IX or glossopharyngeal nerve, cranial nerve X or vagus nerve and cranial nerve XI or spinal accessory nerve
What peripheral nerve contain visceral efferent pathways at their origin? 121.22
cranial nerve III or oculomotor nerve, cranial nerve VII or facial nerve, cranial nerve IX or glossopharyngeal nerve, cranial nerve X or vagus nerve as well as spinal nerves T1-T12, L1, L2 and S2-S4
What are the ultimate target cells of the visceral efferent pathways? 122.23
smooth muscles, cardiac muscle, glandular tissue, and some unique specialized cell types
What is the location for the secondary sympathetic efferent neuron cell body? 122.35
a prevertebral ganglion or paravertebral ganglion
Primary parasympathetic efferent neurons will be associated with which cranial nerves? 123.40
cranial nerve III or oculomotor nerve, cranial nerve VII or facial nerve, cranial nerve IX or glossopharyngeal nerve and cranial nerve X or vagus nerve
What is the name given to and neuroactive substance associated with postganglionic parasympathetic efferent fibers? 123.46
cholinergic fibers; acetylcholine
What types of efferent neurons form nuclei of origin in the brain? 124.8
somatic neurons, branchial neurons, and primary parasympathetic neurons
Will sympathetic efferent neurons be located in the brain? 124.9
no
What are the four classifications of afferent neurons? 124.17
somatic afferent, visceral afferent, special visceral afferent, and special sensory
What do somatic afferents monitor? 124.18
pain, temperature, light touch and proprioception
What do visceral afferents monitor? 124.19
barorecption, chemoreception, sensation from viscera
What do special visceral afferents monitor? 125.20
olfaction and taste
What do special sensory afferents monitor? 125.21
vision, hearing, equilibrium
What is unusual about the receptor ending of the primary olfactory neuron? 125.5
it is an olfactory knob covered with olfactory cilia
What forms the true olfactory nerve? 125.7
fila olfactoria
What is the location for synapse between primary and secondary afferent neurons of the first cranial nerve? 125.11
olfactory glomerulus
What is the name of the traditional secondary afferent neuron of the first cranial nerve? 125.12
mitral cell
What is the function of the rod cell? 126.3
provide vision in dim light conditions
What is the function of the cone cell? 126.4
provide vision in bright light conditions and mediate color vision
What is the most numerous photoreceptor cell? 126.5
rod cell
What forms the optic nerve? 126.11
axons of ganglion cells
What occurs at the optic chiasma? 126.14
part of the optic nerve decussates
Axons carried in the second cranial nerve will synapse in what specific location? 126.16
lateral geniculate nucleus
At its apparent origin cranial nerve III conveys which classifications of neural pathways? 127.1
somatic efferent pathway and visceral efferent pathway
What is the somatic efferent nucleus of origin for the third cranial nerve? 127.2
oculomotor nuclear complex
What is/are the target organ(s) for the somatic efferent fibers carried in the third cranial nerve? 127.7
medial rectus, inferior rects, superior rectus, and inferior oblique extrinsic muscles of the eyeball and the levator palpebrae superioris muscle of the eyelid
Visceral efferent fibers conveyed in the third cranial nerve originate from which nucleus? 127.11
accessory oculomotor nucleus of Edinger/Westphal
What is the location of synapse for preganglionic parasympathetic efferent fibers of the third cranial nerve? 127.13
ciliary ganglion
Postganglionic parasympathetic effernt fibers of the third cranial nerve are carried in which nerve? 127.14
short ciliary nerve
postganglionic parasympathetic efferent fibers of the third cranial nerve synapse in what targets? 128.15
sphincter pupillae and ciliaris intrinsic eye muscles
What are the two unique features of the fourth cranial nerve? 129.6
it is the only cranial nerve with an apparent origin from the dorsal surface of the brain; it is the only cranial efferent nerve to decussate within the midline from its nucleus
The right fourth cranial nerve will innervate which side target muscle? 129.7
the right side muscle
Somatic efferent fibers from the fourth cranial nerve will innervate which muscle(s)? 129.10
superior oblique extrinsic muscle of the eye
the fifth cranial nerve is functionally referred to as the ____. 130.1
great sensory nerve of the face
What is the exit sit from the cranial vault for each division of the fifth cranial nerve? 130.7
ophthalmic nerve-superior orbital fissure,
maxillary nerve-foramen rotumdum,
mandibular nerve-foramen ovale
What location will each branch of the fifth cranial nerve pass into upon exit from the cranial vault? 130.8
opthalmic nerve-orbit;
maxillary nerve-pterygopalatine region;
mandibular nerve-infratemporal region
Peripheral sensory processes of the fifth cranial nerve are primarily derived from pseudounipolar afferent neuron cell bodies located in which ganglion? 130.12
semilunar ganglion, trigeminal ganglion, Gasserian ganglion
Central sensory processes carried in the fifth cranial nerve synapse with secondary sensory neuron cell bodies in what location? 131.15
mainly in the principal sensory nucleus, some in the spinal trigeminal nucleus
What are the names of the muscles of mastication? 130.21
temporalis, masseter, medial pterygoid, lateral pterygoid
What muscles are innervated by branchial efferent fibers conveyed in the fifth cranial nerve? 130.20
temporalis, masseter, medial pterygoid, lateral pterygoid, mylohyoid, anterior belly of the digastric, tensor tympani and tensor veli palatini
The fifth cranial nerve carries peripheral sensory processes from endings located in the muscles of mastication and the extraocular muscles to pseudounipolar cells located in which nucleus? 130.27
mesencephalic nucleus of the trigeminal nucleus
The sixth cranial nerve will innervate what target organ(s)? 132.7
lateral rectus extrinsic muscle of the eye
Peripheral sensory processes conveyed in the sixth cranial nerve will communicate with which cranial nerve branch? 132.9
ophthalmic division of trigeminal
Because of its function, the seventh cranial nerve is often called the _____133.2
great motor nerve of the face
What classificaitons of fibers are conveyed at the apparent origin of the seventh cranial nerve? 133.5
branchial efferent, visceral efferent, somatic afferent, special visceral afferent
What is the name of the afferent ganglion for the seventh cranial nerve? 133.8
geniculate ganglion, genicular ganglion
Most of the seventh cranial nerve will exit the skull via what opening? 133.9
the stylomastoid foramen
Branchial efferent fibers carried in the seventh cranial nverve will innervate what muscles? 133.11
muscles of facial expression, muscles of the scalp and auricle, the buccinator, platysma, stapedius, stylohyoid, and posterior belly of the digastric
Visceral efferent fibers conveyed in the seventh cranial nerve originate from which nucleus? 133.14
superior salivatory nucleus
Which immediate branch of the seventh cranial nerve will convey preganglionic parasympathetic efferent fibers to the lacrimal gland? 134.16
greater petrosal or greater superficial petrosal nerve
Which branch of the seventh cranial nerve will convey preganglionic parasympathetic fibers into the pterygopalatine ganglion? 134.17
vidian nerve or nerve of the pterygoid canal
What are the names of the ganglion of synapse in the efferent pathway to the lacrimal gland? 134.21
pterygopalatine ganglion, sphenopalatine ganglion, Meckel’s ganglion
Postganglionic parasympathetic efferent fibers from the pterygopalatine, sphenopalatine or Meckel’s ganglion will become incorporated in which cranial nerve branch? 134.22
maxillary nerve of the trigeminal
The parasympathetic pathway to the lacrimal gland will involve branches from which cranial nerves? 134.26
facial and trigeminal nerves
The zygomaticotemporal nerve will convey postganglionic parasympathetic efferent fibers to the lacrimal gland through a communication with which branch of the fifth cranial nerve? 134.29
opthalmic nerve
preganglionic parasympathetic efferent fibers from the seventh cranial nerve to submandibular and sublingual glands will exit the pons in what nerve? 135.34
nervus intermedius, nerve of Wrisberg, sensory root of facial nerve
which immediate branch of the seventh cranial nerve will convey preganglionic parasympathetic efferent fibers to the submandibular and sublingual glands? 134.35
chorda tympani nerve
The chorda tympani nerve exits the temporal bone via which opening? 135.36
the petrotympanic fissure of the temporal bone
The chorda tympani nerve will join which nerve? 135.38
the lingual nerve of the mandibular division of the trigeminal
peripheral sensory processes form receptors around the ear and mastoid region are conveyed in the seventh cranial nerve to what ganglion? 136.44
vagus
In general, somatic afferent pathways typically terminate on which nucleus? 136.48
thee spinal trigeminal nucleus
What is the classification of sensory fibers associated with taste? 136.49
special visceral afferent fibers
Peripheral sensory processes form taste receptors in the anterior two thirds of the tongue are conveyed in the seventh cranial nerve to what ganglion? 136.53
genicular ganglion or geniculate ganglion
What fluid is present within the membranous labyrinth? 137.8
endolymph
What is the name given to spial appearance of the organ for hearing? 137.9
cochlea
How is sound or position converted into a neural impulse? 137.14
endolymph is displaced and alters the membrane of a specialized receptor cell
In what elevations of each part of the vestibular apparatus will receptor cells be identified? 138.17
the macula of the saccule, the macula of the utricle, and the crista ampullaris of the ampullae of the semicircular ducts
What is unique to the recepotor cells associated with equilibrium? 138.18
stereocilia and a single kinocilium
What is the location of the primary afferent neuron associated with equilibrium? 138.20
Scarpa’s ganglion or the vestibular ganglion
Central sensory processes of primary afferent neurons associated with equilibrium will terminate on secondary afferent neurons in what location? 138.23
the vestibular nuclear complex
Receptor cells associated with hearing are located in what structure? 138.26
the organ of Corti in the cochlear duct of scala media
What is the unique feature of receptor cells associated with hearing? 138.27
stereocilia
What is the location of the primary afferent neuroun associated with hearing? 138.29
The spiral ganglion or cochlear ganglion
Branchial efferent fibers conveyed in the ninth cranial nerve will innervate what target? 139.7
stylopharyngeus muscle
Preganglionic parasympathetic efferent fibers are observed in what primary branch of the ninth cranial nerve? 139.10
tympanic nerve or nerve of Jabobson
Within the temporal bone, preganglionic parasympathetic efferent fibers of the ninth cranial nerve will ultimately form what nerve? 139.12
the lesser (superficial) petrosal nerve
Preganglionic parasympathetic efferent fibers will be found in what branch(es) of the ninth cranial nerve? 140.13
the tympanic nerve and lesser (superficial) petrosal nerve
Preganglionic parasympathetic efferent fibers from the ninth cranial nerve will synapse in which ganglion? 140.16
otic ganglion or Arnold’s ganglion
Postgangionic parasympathetic efferent fibers from the otic or Arnold’s ganglion will communicate with what other cranial nerve branch? 140.17
The auriculotemporal branch of the mandibular division of the trigeminal
Peripheral afferent processes associated with receptors in the mastoid air cells, in the tympanic cavity or in the auditory tube arise from pseudounipolar neurons located in what ganglion of the ninth cranial nerve? 140.22
the superior glossopharyngeal ganglion or jugular ganglion
What is/are the target organ(s) monitoring blood pressure or blood physiology which are supplied by the ninth cranial nerve? 141.25
carotid body or carotid glomus and the carotid sinus
Ninth cranial nerve pseudounipolar neuron cell bodies monitoring general visceral sensations are located in which ganglion? 141.28
inferior glossopharyngeal ganglion or petrosal ganglion
Central sensory processes from the postsulcal (posterior one third) tongue are conveyed in which cranial nerve? 141.29
cardiorespiratory nucleus of the nucleus solitarius
Ninth cranial nerve pseudounipolar sensory neuron cell bodies monitoring taste are located in which ganglion? 141.31
inferior glossopharyngeal ganglion or petrosal ganglion
Branchial efferent fibers conveyed in the tenth cranial nerve will innervate what target organ(s)? 142.8
muscles of the soft palate; constrictor muscles of the pharynx; cricothyroid muscle and palatoglossus muscle
Where will preganglionic parasympathetic efferent fibers of the tenth cranial nerve synapse? 142.10
intramural ganglia of the target organs and the cardiac plexus
What is the location of the primary afferent neurons of the tenth cranial nerve whose peripheral processes are associated with generral somatic sensation from the posterior cranial dura? 142.12
jugular ganglion or superior vagal ganglion
Where will central processes of pseudounipolarr afferent neurons of the tenth cranial nerve associated with somatic sensation synapse? 142.13
the spinal trigeminal nucleus
Peripheral processes of pseudounipolar neuronss associated with general visceral sensations are carried in the tenth cranial nerve to what location? 142.14
the nodose ganglion or inferior vagal ganglion
Central processes of pseudounipolar neurons associated with general visceral sensation are carried in the tenth cranial nerve to synapse at what location? 142.15
the caridorespiratory nucleus of the nucleus solitarius
What is/are the target organ(s) monitoring blood pressure or blood pressure of blood physiology supplied by the tenth cranial nerve? 142.16
aortic body or aortic glomus and the aortic arch
What is specifically monitored by each type of vascular visceral receptor associated with tenth cranial nerve? 142.18
baroreceptors monior blood pressure
chemoreceptors monitor hypoxia (decreased oxygen), hypercapnia (increase carbon dioxide) and increasing hydrogen ions (blood pH)
Where are pseudounipolar primary afferent neurons associated with taste sensation from the epiglottis located? 142.19
the nodose ganglion or inferior vagal ganglion
