Question 1

________ Becomes specialized for sensitivity to light&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The inner layer of the optic cup becomes the neural layer of the retina.It differentiates into the visual receptive portion of the adult retina.The inner layer of the optic cup also gives rise to the ciliary and the iridial parts of the retina.

Question 2

________ Absorption focus&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The central parts of the walls of the disclike diverticula from the utricular portion of the otocyst fuse and later disappear.Degeneration of tissue proceeds peripherally from the absorption focus,but peripheral portions of the diverticula remain as the semicircular ducts.

Question 3

________ External acoustic meatus&#10;A)Conjunctival epithelium&#10;B)Neuroectoderm&#10;C)First pharyngeal pouch&#10;D)First pharyngeal groove&#10;E)Mesenchyme

Accepted Answer

The external acoustic meatus is the adult derivative of the dorsal part of the first pharyngeal groove.It grows inward as a funnel-shaped tube until it reaches the endodermal tubotympanic recess,primordium of the tympanic cavity,tympanic antrum,pharyngotympanic (auditory)tube,and mastoid cells.

Question 4

________ Tunica vasculosa lentis&#10;A)Scleral venous sinus&#10;B)Optic nerve&#10;C)Corneal epithelium&#10;D)Central artery of retina&#10;E)Pupillary membrane

Accepted Answer

The anterior part of the tunica vasculosa lentis,a vascular layer around the embryonic lens,is called the pupillary membrane.When the distal part of the hyaloid artery degenerates,the tunica vasculosa lentis,including the pupillary membrane,also degenerates.Remnants of this membrane often appear as tissue strands in normal eyes of infants,but these strands usually cause little disturbance of vision and tend to disappear in old age.

Question 5

________ Primordium of the cochlea&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The cochlear duct develops as a tubular diverticulum from the saccular part of the otocyst.The cochlear duct grows and makes two and a half turns around the developing modiolus,a bony pillar or core that contains nerves and vessels.The coiled cochlear duct is called the membranous cochlea.It is contained in the bony cochlea,which develops from the surrounding mesenchyme.

Question 6

________ Gives rise to the lens&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The lens develops from the lens vesicle,a derivative of the surface ectoderm.The anterior wall of this vesicle becomes the anterior epithelium of the adult lens.Cells of the posterior wall lengthen to form lens fibers,which grow into and gradually obliterate the cavity of the lens vesicle.

Question 7

________ Ganglion cells of retina&#10;A)Scleral venous sinus&#10;B)Optic nerve&#10;C)Corneal epithelium&#10;D)Central artery of retina&#10;E)Pupillary membrane

Accepted Answer

As the neural layer of the retina develops from the inner layer of the optic cup,the axons of ganglion cells in the retina pass into the inner wall of the optic stalk and gradually convert it into the optic nerve.

Question 8

________ Becomes the pigmented layer of the retina&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The external layer of the optic cup differentiates into the pigmented layer of the retina.The pigmented epithelium consists of a single layer of cells that reinforces the light-absorbing properties of the choroid membrane to reduce scattering of light within the eye.

Question 9

________ Neuroectoderm&#10;A)Scleral venous sinus&#10;B)Optic nerve&#10;C)Corneal epithelium&#10;D)Central artery of retina&#10;E)Pupillary membrane

Accepted Answer

The optic vesicle is an outgrowth of the brain.Hence,the retina and the optic nerve are derived from neuroectoderm of the embryonic brain.The adult structure of the retina and optic nerve shows a marked resemblance to the brain,and the coats of the eyeball and the optic nerve show resemblances to the coverings of the brain.The central artery and vein of the retina pass in the meningeal sheaths and are included in the anterior part of the optic nerve.This relation is of clinical significance because an increase in pressure of cerebrospinal fluid around the optic nerve interferes with venous return from the eye,and edema of the optic disc (papilledema)results.This is an important indicator of an increase in intracranial pressure.

Question 10

________ Retinal fissure&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The retinal fissure (optic fissure)develops on the inferior surface of the optic cup and along the optic stalk.The hyaloid blood vessels pass into the optic cup along this cleft and supply the lens and the developing neural layer of the retina.

Question 11

________ Differentiates into the nonpigmented portion of the ciliary epithelium&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The answer of   ________ Differentiates into the nonpigmented...

Question 12

________ Gives rise to a semicircular duct&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The answer of   ________ Gives rise to a...

Question 13

________ Sclera and choroid&#10;A)Conjunctival epithelium&#10;B)Neuroectoderm&#10;C)First pharyngeal pouch&#10;D)First pharyngeal groove&#10;E)Mesenchyme

Accepted Answer

The answer of ________ Sclera and choroid&#10;A)Conjunctival epithelium&#10;B)Neuroectoderm&#10;C)First pharyngeal pouch&#10;D)First...

Question 14

________ Endolymphatic duct&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The answer of   ________ Endolymphatic duct&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E...

Question 15

________ Future optic nerve&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The answer of   ________ Future optic nerve&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E...

Question 16

________ Hyaloid artery&#10;A)Scleral venous sinus&#10;B)Optic nerve&#10;C)Corneal epithelium&#10;D)Central artery of retina&#10;E)Pupillary membrane

Accepted Answer

The answer of ________ Hyaloid artery&#10;A)Scleral venous sinus&#10;B)Optic nerve&#10;C)Corneal epithelium&#10;D)Central...

Question 17

________ Surface ectoderm&#10;A)Scleral venous sinus&#10;B)Optic nerve&#10;C)Corneal epithelium&#10;D)Central artery of retina&#10;E)Pupillary membrane

Accepted Answer

The answer of ________ Surface ectoderm&#10;A)Scleral venous sinus&#10;B)Optic nerve&#10;C)Corneal epithelium&#10;D)Central...

Question 18

________ Saccular part of the otic vesicle&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The answer of   ________ Saccular part of the...

Question 19

________ Gives rise to the spiral organ&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The answer of   ________ Gives rise to the...

Question 20

________ Congenital glaucoma&#10;A)Scleral venous sinus&#10;B)Optic nerve&#10;C)Corneal epithelium&#10;D)Central artery of retina&#10;E)Pupillary membrane

Accepted Answer

The answer of ________ Congenital glaucoma&#10;A)Scleral venous sinus&#10;B)Optic nerve&#10;C)Corneal epithelium&#10;D)Central...

Question 21

________ Gives rise to the utricle&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The answer of   ________ Gives rise to the...

Question 22

________ Hyaloid vessels&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The answer of   ________ Hyaloid vessels&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E...

Question 23

________ Derived from the first pharyngeal arch cartilage&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The answer of   ________ Derived from the first...

Question 24

________ Continuous with the neural layer of the retina&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The answer of   ________ Continuous with the neural...

Question 25

________ Tympanic cavity&#10;A)Conjunctival epithelium&#10;B)Neuroectoderm&#10;C)First pharyngeal pouch&#10;D)First pharyngeal groove&#10;E)Mesenchyme

Accepted Answer

The answer of ________ Tympanic cavity&#10;A)Conjunctival epithelium&#10;B)Neuroectoderm&#10;C)First pharyngeal pouch&#10;D)First pharyngeal...

Question 26

________ Develops from mesenchyme&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The answer of   ________ Develops from mesenchyme&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E...

Question 27

________ Ciliary body&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The answer of   ________ Ciliary body&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E...

Question 28

________ Mastoid cells&#10;A)Conjunctival epithelium&#10;B)Neuroectoderm&#10;C)First pharyngeal pouch&#10;D)First pharyngeal groove&#10;E)Mesenchyme

Accepted Answer

The answer of ________ Mastoid cells&#10;A)Conjunctival epithelium&#10;B)Neuroectoderm&#10;C)First pharyngeal pouch&#10;D)First pharyngeal...

Question 29

________ Continuous with the cranial meninges&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The answer of   ________ Continuous with the cranial...

Question 30

________ Only derived from surface ectoderm&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The answer of   ________ Only derived from surface...

Question 31

________ Membranous labyrinth&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The answer of   ________ Membranous labyrinth&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E...

Question 32

________ Has same origin as the cornea&#10;A)Conjunctival epithelium&#10;B)Neuroectoderm&#10;C)First pharyngeal pouch&#10;D)First pharyngeal groove&#10;E)Mesenchyme

Accepted Answer

The answer of ________ Has same origin as the cornea&#10;A)Conjunctival...

Question 33

________ Continuous with the pigmented epithelium of the retina&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The answer of   ________ Continuous with the pigmented...

Question 34

________ Contains axons of ganglion cells&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The answer of   ________ Contains axons of ganglion...

Question 35

________ Gradually obliterates&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The answer of   ________ Gradually obliterates&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E...

Question 36

________ Bipolar cells of the retina&#10;A)Conjunctival epithelium&#10;B)Neuroectoderm&#10;C)First pharyngeal pouch&#10;D)First pharyngeal groove&#10;E)Mesenchyme

Accepted Answer

The answer of ________ Bipolar cells of the retina&#10;A)Conjunctival epithelium&#10;B)Neuroectoderm&#10;C)First...

Question 37

________ Meatal plug&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The answer of   ________ Meatal plug&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E...

Question 38

________ Derived from the tubotympanic recess&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The answer of   ________ Derived from the tubotympanic...

Question 39

________ Composed of vitreous humor&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The answer of   ________ Composed of vitreous humor&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E...

Question 40

________ External acoustic meatus&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The answer of   ________ External acoustic meatus&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E...

Question 41

________ Cornea&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E

Accepted Answer

The answer of   ________ Cornea&#10;A)A&#10;B)B&#10;C)C&#10;D)D&#10;E)E...

Deck 16: Eye and Ear