HBF & vision

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#أطباء_2020
Quiz by #أطباء_2020 , updated more than 1 year ago
#أطباء_2020
Created by #أطباء_2020 over 9 years ago
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Resource summary

Question 1

Question
Which of the following is true of the vascular layer of the eye
Answer
  • Provides a route for blood vessels and lymphatics that supply the eye
  • Regulates the amount of light entering the eye
  • Secretes and reabsorbs the aqueous humour
  • Controls the shape of the lens
  • All of above

Question 2

Question
The space between the iris and cilliary body and the lens is the:
Answer
  • Anterior chamber
  • Posterior chamber
  • Pupil
  • Posterior cavity
  • B and D

Question 3

Question
In human eye, most refraction occurs when light passes through the
Answer
  • Iris
  • Cornea
  • Lens
  • Aqueous humor
  • Vitreous humor

Question 4

Question
Linear acceleration in the vertical plane is signaled by hair cells in
Answer
  • Anterior semicircular canal
  • Saccule
  • Posterior semicircular canal
  • Utricle

Question 5

Question
Alpha block is produced by
Answer
  • Mental arithmetic
  • Stimulation of ascending reticular activating system
  • Opening one eye
  • During sleep

Question 6

Question
Hypothalamus doesn't play a prominent role in the regulation of
Answer
  • Food and water intake
  • Temperature
  • Respiration
  • Osmolality

Question 7

Question
The categorical hemisphere is chiefly concerned with
Answer
  • Language
  • Recognition of faces
  • Stereognosis
  • Spatiotemporal relations

Question 8

Question
Damage to what region of the brain affects recent memory, Which is the process in which short-term memory is converted to long-term memory
Answer
  • Pons
  • Medulla
  • Substantia nigra
  • Hypothalamus
  • Hippocampus

Question 9

Question
Regarding sleep :
Answer
  • Slow wave sleep reflects mental rest
  • Slow wave sleep is associated with rapid eye movement
  • During slow wave sleep, the secretion of GH is decreased
  • REM sleep is associated with marked decrease in muscle tone

Question 10

Question
The ciliary muscle contracts to:
Answer
  • Control amount of light reaching the retina
  • Adjust the shape of the lens for distant vision
  • Adjust the shape of the lens for near vision
  • Control the production of aqueous humor
  • Adjust the shape of the cornea and vitreous

Question 11

Question
The transparent anterior portion of the eye is :
Answer
  • Choroid
  • Ciliary body
  • Cornea
  • Iris
  • Retina

Question 12

Question
When a bright light shines in the eye, what reflex action takes place
Answer
  • Ciliary body secretes tears
  • Extrinsic eye muscles contract
  • Radial muscles of the iris contract
  • Ciliary muscles contract
  • Circular muscles of iris contract

Question 13

Question
What is the function of the fatty layer in tears:
Answer
  • Make photoreceptor cells
  • Make mucous
  • Produce cilia to wipe dust away from eye surface
  • Make an oily secretion to lubricate the eye & prevents rapid tear evaporation
  • Promote lid closure reflexes

Question 14

Question
Rods and cones are distributed over the entire retina except for the
Answer
  • Optic disc
  • Choroids
  • Ora serrata
  • Sclera
  • Lens

Question 15

Question
What is the ability of the eye to focus specifically on close objects (less than 20 feet away )
Answer
  • Adaptation
  • Accommodation
  • Refraction
  • Synthesis
  • Indentation
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