Questions
What is the mucosa lining of olfactory region called?
- Jacobson's organ
- Schneiderian membrane
- Sclera
- Membranous labyrinth
What kind of receptors are olfactory receptors?
- Photoreceptors
- Mechanoreceptors
- Thermoreceptors
- Chemoreceptors
The junction which marks the transition from the simple non-photosensitive area of the retina to the complex, multi-layered photosensitive region is called
- fovea
- macula
- orra serrata
- bulbar sheath
Which layer maintains the shape of eyeball?
- Choroid
- Sclera
- Retina
- Conjunctiva
Which layer provides the surface for attachment of eye muscles?
- Choroid
- Sclerotic
- Conjunctiva
- Retina
Which muscle dilates pupil?
- Circular muscle
- Radial muscle
- Inferior rectus muscle
- Superior oblique muscle
What does blind spot contain?
- Only rods
- Only cones
- Both rods and cones
- Neither rods nor cones
Which pigment in cones allows them to respond to green light?
- Erythrolabe
- Cyanolabe
- Chlorolabe
- Rhodopsin
What are ciliary muscles responsible for?
- Persistence of vision
- Accommodation of lens
- Dilation of pupil
- Constriction of pupil
What does yellow spot contain?
- Only cones
- Only rods
- Both rods and cones
- Neither rods nor cones
From which point do optic nerve fibers leave retina?
- Yellow spot
- Blind spot
- Pars optica
- Ora serrata
Where is aqueous chamber present?
- Between lens and retina
- Between lens and cornea
- On the surface of conjunctiva
- Behind the retina
What is the function of Jacobson's organ in humans?
- It contains sensory cells for hearing.
- It smells the food and keeps it in knowledge.
- It is a vestigial organ.
- It is an exocrine gland.
What happens during bleaching in eye?
- Lodopsin is converted to scotopsin and retinol.
- Rhodopsin is converted to scotopsin and retinol.
- Scotopsin and retinol combine to re-synthesise rhodopsin.
- Eyes loses power of vision.
Which gland produces secretions to keep the eyes moist?
- Meibomian gland
- Lacrimal gland
- Ceruminous gland
- Pituitary gland