Each question in this quiz is timed.
Which of the following is true of the vascular layer of the eye
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
The space between the iris and cilliary body and the lens is the:
Anterior chamber
Posterior chamber
Pupil
Posterior cavity
B and D
In human eye, most refraction occurs when light passes through the
Iris
Cornea
Lens
Aqueous humor
Vitreous humor
Linear acceleration in the vertical plane is signaled by hair cells in
Anterior semicircular canal
Saccule
Posterior semicircular canal
Utricle
Alpha block is produced by
Mental arithmetic
Stimulation of ascending reticular activating system
Opening one eye
During sleep
Hypothalamus doesn't play a prominent role in the regulation of
Food and water intake
Temperature
Respiration
Osmolality
The categorical hemisphere is chiefly concerned with
Language
Recognition of faces
Stereognosis
Spatiotemporal relations
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
Pons
Medulla
Substantia nigra
Hypothalamus
Hippocampus
Regarding sleep :
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
The ciliary muscle contracts to:
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
The transparent anterior portion of the eye is :
Choroid
Ciliary body
Retina
When a bright light shines in the eye, what reflex action takes place
Ciliary body secretes tears
Extrinsic eye muscles contract
Radial muscles of the iris contract
Ciliary muscles contract
Circular muscles of iris contract
What is the function of the fatty layer in tears:
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
Rods and cones are distributed over the entire retina except for the
Optic disc
Choroids
Ora serrata
Sclera
What is the ability of the eye to focus specifically on close objects (less than 20 feet away )
Adaptation
Accommodation
Refraction
Synthesis
Indentation