Eye Quiz

40 Questions

Settings
Please wait...
Eye  Quizzes & Trivia

Questions and Answers
  • 1. 
    Number of cones for mammals and birds respectively.
    • A. 

      3-4; 2

    • B. 

      4; 2-3

    • C. 

      2; 3

    • D. 

      2; 3-4

  • 2. 
    Where does visual information processing occur in birds?
    • A. 

      Optic nerve

    • B. 

      Optic disc

    • C. 

      Optic tectum

    • D. 

      Paired nuclei superior colliculus

  • 3. 
    Which type of animals have 2 types of cones? What species are an exception?
    • A. 

      Mammals; Primates & humans

    • B. 

      Mammals & Avians; Reptiles

    • C. 

      Mammals; Avians & Reptiles

    • D. 

      Domestic animals; Avians

  • 4. 
    Which part(s) of the nervous system detects a stimulus?
    • A. 

      Optic nerve

    • B. 

      Sensory receptor

    • C. 

      Ciliary ganglion

    • D. 

      Trochlear nerve

    • E. 

      All of the above

  • 5. 
    Match the following muscles with correct actions.
    • A. Dorsal rectus
    • A.
    • B. Ventral rectus
    • B.
    • C. Lateral rectus
    • C.
    • D. Medial rectus
    • D.
  • 6. 
    The insertion of rectus muscle is Annulus of Zinn. True or false?
    • A. 

      True

    • B. 

      False

  • 7. 
    Which of the following is NOT a characteristic of rods in the eye?
    • A. 

      Function in low light levels

    • B. 

      More in central retina

    • C. 

      Sensitive to motion

    • D. 

      Responsive to blue light

  • 8. 
    Which features of the eye does the outermost fibrous tunic consist of?
    • A. 

      Cornea

    • B. 

      Pupil

    • C. 

      Sclera

    • D. 

      Limbus

    • E. 

      Lens

  • 9. 
    Match the following muscles with correct actions.
    • A. Orbicularis oculi
    • A.
    • B. Retractor anguli oculi
    • B.
    • C. Corrugator supercilli
    • C.
  • 10. 
    'Pink eye' is the inflammation of which eye tissue?
    • A. 

      Cornea

    • B. 

      Conjunctiva

    • C. 

      Iris

    • D. 

      Sclera

  • 11. 
    Which features of the eye does the internal nervous tunic consist of?
    • A. 

      Retina

    • B. 

      Iris

    • C. 

      Optic disc

    • D. 

      Cornea

    • E. 

      Pupil

  • 12. 
    What is the function of the optic nerve?
    • A. 

      Controls blink response and lacrimal glands

    • B. 

      Innervates extraocular muscles

    • C. 

      Relays visual signal from retina to central nervous system (CNS)Sensory function

    • D. 

      Receives sensory input from eye & adnexa, including cornea, conjunctive, orbit, lacrimal gland & periocular skin

  • 13. 
    Which features of the eye does the uvea consist of?
    • A. 

      Choroid

    • B. 

      Cornea

    • C. 

      Retina

    • D. 

      Iris

    • E. 

      Lens

  • 14. 
    What structures can be found in rods and cones? Select all the correct answers below.
    • A. 

      Spherule

    • B. 

      Synaptic Lamella

    • C. 

      Dura Mata

    • D. 

      Microtubules

    • E. 

      Uveal tract

    • F. 

      Pia-arachnoid

    • G. 

      Golgi

  • 15. 
    The cornea is responsible for most of the refractive power of the eye.
    • A. 

      True

    • B. 

      False

  • 16. 
    Canines and felines have the same Nasolacrimal anatomy features. True or false?
    • A. 

      True

    • B. 

      False

  • 17. 
    Image: Ocular muscles of left eye, viewed from medial angle. Identify structure 1.
    • A. 

      Dorsal rectus

    • B. 

      Dorsal oblique

    • C. 

      Ventral oblique

    • D. 

      Retractor bulbi

  • 18. 
    Which type of photoreceptor is best able to process bright light and colour?
    • A. 

      Cones

    • B. 

      Rods

    • C. 

      Iodopsin

    • D. 

      Rhodopsin

  • 19. 
    Which of the following depicts the lacrimal gland?
    • A. 
    • B. 
    • C. 
    • D. 
  • 20. 
    Rods take a shorter time to adapt to darkness than cones.
    • A. 

      True

    • B. 

      False

  • 21. 
    From the muscles below, choose all that involves Sclera as a point of insertion.
    • A. 

      Dorsal rectus

    • B. 

      Ventral rectus

    • C. 

      Retractor anguli oculi

    • D. 

      Dorsal oblique

    • E. 

      Levator palpebrae superioris

    • F. 

      Retractor bulbi

  • 22. 
    Arrange the following in the correct order when light is absorbed.
    • A. 

      CGMP is broken down & Na+ channels close -> Na+ concentration in cell decreases -> Rods and cones hyperpolarize -> Release of transmitter is reduced -> Inhibition & stimulation of ganglion cells

    • B. 

      CGMP is broken down & Na+ channels close -> Na+ concentration in cell decreases -> Release of transmitter is reduced -> Rods and cones hyperpolarize -> Inhibition & stimulation of ganglion cells

    • C. 

      Inhibition & stimulation of ganglion cells -> cGMP is broken down & Na+ channels close -> Na+ concentration in cell decreases -> Rods and cones hyperpolarize -> Release of transmitter is reduced

    • D. 

      Inhibition & stimulation of ganglion cells -> cGMP is broken down & Na+ channels close -> Na+ concentration in cell decreases -> Release of transmitter is reduced -> Rods and cones hyperpolarize

  • 23. 
    Image: Anterior half of the left equine eye, viewed from behind. Which of the following rotate the globe medially?
    • A. 

      Dorsal oblique

    • B. 

      Retractor bulbi

    • C. 

      Dorsal rectus

    • D. 

      Levator palpebrae superioris

  • 24. 
    Following is the layers of the Retina. List the layers in order from superficial to deep.
    • A. Retinal pigment epithelium (RPE)
    • A.
    • B. Outer nuclear layer
    • B.
    • C. Inner nuclear layer
    • C.
    • D. Photoreceptor layer (rods and cones layer)
    • D.
    • E. External limiting membrane
    • E.
    • F. Internal limiting membrane
    • F.
    • G. Outer plexiform layer
    • G.
    • H. Inner plexiform layer
    • H.
    • I. Ganglion cell layer
    • I.
    • J. Optic nerve fibre layer
    • J.
  • 25. 
    Orbicularis oculi closes the eyelid when it contracts.
    • A. 

      True

    • B. 

      False

  • 26. 
    Which of the following is NOT a function of the sclera?
    • A. 

      Protection of internal ocular structures

    • B. 

      Nourishment of retina

    • C. 

      Maintain eye shape

    • D. 

      Provide surface area for muscle attachment

  • 27. 
    All of the following are important in formation of a clear image when viewing a distant object EXCEPT
    • A. 

      Accommodation of lens

    • B. 

      Flattening of the lens

    • C. 

      Dilation of pupil

    • D. 

      Contraction of ciliary muscles

  • 28. 
    The receptive field in ganglion cells respond to light stimulus and the two regions, a centre and a surround in receptive field respond oppositely to the light stimulus. Under On-centre cell response, centre illumination will be                      and surround illumination will be                         
    • A. 

      Decrease & Increase

    • B. 

      Decrease & Decrease

    • C. 

      Increase & Increase

    • D. 

      Increase & Decrease

  • 29. 
    Which of the following is/are true?
    • A. 

      Photopigments are receptor molecules in the retina

    • B. 

      When light strikes the retina, photons are trapped by the receptor molecules located in optic tectum

    • C. 

      Photopigments are composed of opsin and retinal

    • D. 

      Rods contains rhodopsin

    • E. 

      Cones contain rhodopsin

    • F. 

      Photoproteins are G-protein-coupled receptors

    • G. 

      All cones have the same type of photopigments

  • 30. 
    Aqueous humor is produced by the choroid.
    • A. 

      True

    • B. 

      False

  • 31. 
    Deep muscular fascia envelops levator palpebrae superioris and lacrimal gland.
    • A. 

      True

    • B. 

      False

  • 32. 
    Herbivores and primates have a larger monocular field and a smaller binocular field as compared to carnivores.
    • A. 

      True

    • B. 

      False

  • 33. 
    'Cataract' is an opacification of which eye structure?
    • A. 

      Lens

    • B. 

      Cornea

    • C. 

      Sclera

    • D. 

      Retina

  • 34. 
    Optokinetic reflex is responsible for stabilising a moving object on the retina when the animal is stationary.
    • A. 

      True

    • B. 

      False

  • 35. 
    The trochlear nerve innervates the dorsal oblique muscle only.
    • A. 

      True

    • B. 

      False

  • 36. 
    Where does the abducent nerve exit from?
    • A. 

      Optic chiasm

    • B. 

      Round foramen

    • C. 

      Stylomastoid foramen

    • D. 

      Orbital fissure

  • 37. 
    Where does ganglion cells connected with bipolar cells and amacrine cells?
    • A. 

      Ganglion layer

    • B. 

      Inner plexiform layer

    • C. 

      Outer nuclear layer

    • D. 

      Photoreceptor layer

  • 38. 
    Vorticose veins are not the main venous drainage system of the eye.
    • A. 

      True

    • B. 

      False

  • 39. 
    Which cranial nerve does the ophthalmic nerve, maxillary nerve and mandibular nerve branch from?
    • A. 

      Cranial nerve IV

    • B. 

      Cranial nerve V

    • C. 

      Cranial nerve VI

    • D. 

      None of the above

    • E. 

      All of the above

  • 40. 
    Which of the following is NOT a layer of the cornea?
    • A. 

      Endothelium

    • B. 

      Stroma

    • C. 

      Pigment layer

    • D. 

      Bowman's membrane