Week 11

Question 0

What is the name given to spiral appearance of the organ for hearing?

Answer 0

Cochlea.

Question 1

What fluid is present within the membranous labyrinth?

Answer 1

Endolymph

Question 2

How is sound or position converted into a neural impulse?

Answer 2

Endolymph is displaced and alters the membrane of a specialized receptor cell.

Question 3

In what elevations of each part of the vestibular apparatus will receptor cells be identified?

Answer 3

The macula of the saccule, the macula of the utricle, and the crista ampullaris of the ampullae of the semicircular ducts.

Question 4

What is unique to the receptor cells associated with equilibrium?

Answer 4

Stereocilia and a single kinocilium.

Question 5

What is the location of the primary afferent neuron associated with equilibrium?

Answer 5

Scarpa’s ganglion or the vestibular ganglion.

Question 6

Central sensory processes of primary afferent neurons associated with equilibrium will terminate on secondary afferent neurons in what location?

Answer 6

The vestibular nuclear complex.

Question 7

Receptor cells associated with hearing are located in what structure?

Answer 7

The organ of Corti in the cochlear duct or scala media.

Question 8

What is the unique feature of receptor cells associated with hearing?

Answer 8

Stereocilia

Question 9

What is the location of the primary afferent neuron associated with hearing?

Answer 9

The spiral ganglion or cochlear ganglion.

Question 10

Branchial efferent fibers conveyed in the ninth cranial nerve will innervate what target?

Answer 10

Stylopharyngeus musle

Question 11

Preganglionic parasympathetic efferent fibers are observed in what primary branch of the ninth cranial nerve?

Answer 11

Tympanic nerve or nerve of Jacobson.

Question 12

Within the temporal nerve, preganglionic parasympathetic efferent fibers of the ninth cranial nerve will ultimately form what nerve?

Answer 12

The lesser (superficial) petrosal nerve.

Question 13

Preganglionic parasympathetic efferent fibers will be found in what branch (es) of the ninth cranial nerve?

Answer 13

The tympanic nerve and lesser (superficial) petrosal nerve.

Question 14

Preganglionic parasympathetic efferent fibers from the ninth cranial nerve will synapse in which ganglion?

Answer 14

Otic ganglion or Arnold’s ganglion.

Question 15

Postganglionic parasympathetic efferent fibers from the otic or Arnold’s ganglion will communicate with what other cranial nerve branch?

Answer 15

The auriculotemporal branch of the mandibular division of the trigeminal.

Question 16

Peripheral afferent processes associated with receptors in the mastoid air cells, in the tympaniccavity or in the auditory tube arise from pseudounipolar neurons located in what ganglion of the ninth nerve?

Answer 16

The superior glossopharyngeal ganglion or jugular ganglion.

Question 17

What is/are the target organ(s) monitoring blood pressure or blood physiology which are supplied by the ninth cranial nerve?

Answer 17

Carotid body or carotid glomus and the carotid sinus.

Question 18

Ninth cranial nerve pseudounipolar neuron cell bodies monitoring general visceral sensation are located in which ganglion?

Answer 18

Inferior glossopharyngeal ganglion or petrosal ganglion.

Question 19

Central sensory processes from ninth cranial nerve pseudounipolar neuron cell bodies monitoring general visceral sensation will synapse in what location of the brain?

Answer 19

Cardiorespiratory nucleus of the nucleus solitarius.

Question 20

Ninth cranial nerve pseudounipolar neuron cell bodies monitoring taste are located in which ganglion?

Answer 20

Inferior glossopharyngeal ganglion or petrosal ganglion.

Question 21

Branchial efferent fibers conveyed in the tenth cranial nerve will innervate what target organ (s)?

Answer 21

Muscles of the soft palate; constrictor muscles of the pharynx; cricothyroid muscle and palatoglossus muscle.

Question 22

Where will preganglionic parasympathetic efferent fibers of the tenth cranial nerve synapse?

Answer 22

Intramural ganglia of the target organs and the cardiac plexus.

Question 23

What is the location of primary afferent neurons of the tenth cranial nerve whose peripheral processes are associated with general somatic sensation from the posterior cranial dura?

Answer 23

Jugular ganglion or superior vagal ganglion.

Question 24

Where will central processes of pseudounipolar afferent neurons of the tenth cranial nerve associated with somatic sensation synapse?

Answer 24

The spinal trigeminal nucleus.

Question 25

Peripheral processes of pseudounipolar neurons associated with general visceral sensation are carried in the tenth cranial nerve to what location?

Answer 25

The nodose ganglion or inferior vagal ganglion.

Question 26

Central processes of central pseudounipolar neurons associated with general visceral sensation are carried in the tenth cranial nerve to synapse at what location?

Answer 26

The cardiorespiratory nucleus of the nucleus solitarius.

Question 27

What is/are the target organ(s) monitoring blood pressure or blood physiology supplied by the tenth cranial nerve?

Answer 27

Aortic body or aortic glomus and the aortic arch.

Question 28

What is specifically monitored by each type of vascular visceral receptors associated with the tenth cranial nerve?

Answer 28

Baroreceptors monitor blood pressure, chemoreceptors monitor hypoxia (decreased oxygen), hypercapnia (increased carbon dioxide), and increased hydrogen ions (blood pH).

Question 29

Where are pseudounipolar primary afferent neurons associated with taste sensation from the epiglottis located?

Answer 29

The nodose ganglion or inferior vagal ganglion.