Chapter 12 - DEVELOPMENT OF SENSE ORGANS

Question 1

It is located at the median area near the rostral margin of the future prosencephalon (neural tube) at the level of
the diencephalon.

Answer 1

Optic Field

Question 2

Failed separation of optic field can cause this condition

Answer 2

cyclopia

Question 3

the light receptor area

Answer 3

nervous retina

Question 4

failure of the optic vesicle to form or interference with the normal growth of the optic cup; often results from deficiency of vitamin A in dogs, pigs, and cows; hereditary or acquired

Answer 4

Anopthalmia/micropthalmia

Question 5

medial /lateraldeviation of the eyeball

Answer 5

Medial/lateral strabismus

Question 6

defect in the growth of the optic cup which is usually seen in the retina and choroid as a focal dysplasia; hereditary defects of the collie dogs

Answer 6

Collie eye

Question 7

loss in the clarity of the lens which maybe hereditary in dogs; appear occasionally in cattle, rarely in horses and cats

Answer 7

Cataract

Question 8

composed of the pinna, external auditory meatus and outer layer of the tympanic membrane sound waves collection

Answer 8

External ear

Question 9

composed of the ear ossicles and inner layer of the tympanic membrane used for conduction of sound waves

Answer 9

Middle ear

Question 10

composed of the bony and membranous labyrinth which function for equilibrium

Answer 10

Inner/internal ear

Question 11

True or false of the 3 parts of the ear, the internal ear is the first to develop

Answer 11

True

Question 12

a localized thickening on either side of the myelencephalon ectoderm

Answer 12

otic placode

Question 13

At 6th wk saccule forms tubular outpocketing at its lower pole called

Answer 13

COCHLEA

Question 14

Develops after the formation and growth of the cochlear duct.

Answer 14

Organ of Corti