Question

Ora serrata is
A)A serrated junction between the retina and ciliary body
B)Oral cavity of protochordates
C)Gland present in oral cavity of frog
D)Present in utriculus of ear

Answer 1

Hint: Ora serrata junction marks the transition from a simple non photosensitive area to a multi layered, photosensitive region.

Complete answer:
Let us analyze the options to find out the correct option

Option A: The ora serrata is basically a serrated junction that is found between the retina and the ciliary body. This junction marks the transition from the simple, non photosensitive area of the ciliary body to a photosensitive multilayered area of the retina.Therefore, this is the correct option.

Option B: The oral cavity of the protochordates do not have the presence of ora serrata.Therefore, this is the incorrect option.

Option C: Ranula is a mucous extravasation cyst gland which is present in the oral cavity of the frogs. It involves a sublingual gland and is found on the floor of the mouth. Ora serrata is not the gland present in the oral cavity of the frog.Therefore, this is the incorrect option.

Option D: Utricle is the part of the inner ear which forms the part of the balancing apparatus. It has no association with the ora serrata.Therefore, this is the incorrect option.

Hence, the correct answer is option (A)

Note: Ora serrata is a toothlike junction. It is found between the peripheral part of the retina and pars plana. The forward extensions of the retina and the backward extensions of the ciliary body combine to form ora serrata.