Question 1

________ Surface ectoderm

Accepted Answer

The corneal epithelium develops from the surface ectoderm during embryonic development.

Question 2

________ Gradually obliterates

Accepted Answer

The answer of  ________ Gradually obliterates
...

Question 3

________ Bipolar cells of the retina

Accepted Answer

Bipolar cells of the retina are derived from the neuroectoderm, which is the embryonic tissue that gives rise to the nervous system. The conjunctival epithelium is the transparent membrane that covers the front of the eye, and is not related to the retina or bipolar cells. The first pharyngeal pouch and groove are structures that form during development of the pharynx, and are also unrelated to the retina or bipolar cells. Mesenchyme is a type of embryonic connective tissue that can give rise to a variety of cell types, but is not specifically related to the retina or bipolar cells.

Question 4

________ Gives rise to a semicircular duct

Accepted Answer

The structure given by the arrow in the image is the ampulla, which is the dilated part of the semicircular duct. Therefore, the structure shown in the image must be giving rise to the semicircular duct, leading to the correct answer being C.

Question 5

________ Mastoid cells

Accepted Answer

Mastoid cells arise from the first pharyngeal pouch during embryonic development.

Question 6

________ Hyaloid artery

Accepted Answer

The hyaloid artery is an embryonic blood vessel that nourishes the developing lens and vitreous humor of the eye. It typically regresses and disappears during fetal development, however, a remnant can sometimes persist and become visible as a thin filament extending from the optic disc towards the lens or posterior surface of the iris. This remnant is known as the central artery of the retina (also known as the persistent hyaloid artery).

Question 7

________ External acoustic meatus

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 8

________ Gives rise to the spiral organ

Accepted Answer

The answer of  ________ Gives rise to the spiral...

Question 9

________ Absorption focus

Accepted Answer

The answer of  ________ Absorption focus
...

Question 10

________ Continuous with the pigmented epithelium of the retina

Accepted Answer

The answer of  ________ Continuous with the pigmented epithelium...

Question 11

________ Primordium of the cochlea

Accepted Answer

The answer of  ________ Primordium of the cochlea
...

Question 12

________ Sclera and choroid

Accepted Answer

The sclera and choroid are both derived from mesenchyme.

Question 13

________ Neuroectoderm

Accepted Answer

The optic nerve is derived from the neuroectoderm, while the other structures listed are derived from different embryonic layers.

Note: A is derived from mesoderm, C is derived from surface ectoderm, D is derived from mesoderm, and E is derived from neural crest cells.

Question 14

________ Tympanic cavity

Accepted Answer

The tympanic cavity develops from the first pharyngeal pouch, which gives rise to the tubotympanic recess.

Question 15

________ Congenital glaucoma

Accepted Answer

Congenital glaucoma is most commonly caused by a developmental abnormality in the scleral venous sinus, also known as the trabecular meshwork, which leads to inadequate drainage of aqueous humor from the eye and increased intraocular pressure. This can result in damage to the optic nerve and irreversible vision loss if not treated promptly.

Question 16

________ Tunica vasculosa lentis

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 17

________ Ganglion cells of retina

Accepted Answer

Ganglion cells are found in the retina, and they form the optic nerve which transmits visual information to the brain.

Question 18

________ Has same origin as the cornea

Accepted Answer

The conjunctival epithelium has the same origin as the cornea, both coming from the surface ectoderm. The neuroectoderm gives rise to the neural tissue, not the cornea. The first pharyngeal pouch and groove contribute to the development of the pharynx and its derivatives, not the eye. Mesenchyme is a loosely organized tissue that provides support and structure to various organs, but it does not give rise to the cornea or conjunctiva.

Question 19

________ Endolymphatic duct

Accepted Answer

The answer of  ________ Endolymphatic duct
...

Question 20

________ Saccular part of the otic vesicle

Accepted Answer

The answer of  ________ Saccular part of the otic...

Quiz 1: Gametogenesis and Fertilization