BNNS501 Exam 2 UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS
What is the white of the eyeball called? - correct answer sclera
What is the function of the eyelid - correct answer protect from intensive light, harmful
particles, and trauma
What is the role of the lacrimal apparatus - correct answer produces tears to protect.
Eyeball and cornea against infection and dryness
What are the three tunics of the eye? - correct answer fibrous tunic, vascular tunic,
retina
What. Structures are involved with the fibrous tunic of the eye? - correct answer sclera
and cornea
What is the function of the neural tunic? - correct answer layer of photoreceptors that
change light into electrochemical signals that are then transported to the cns
What is the ciliary body? - correct answer smooth muscle attached to lens that changes
the shape according to light levels
What is the coloured part of the eye called? - correct answer iris
What is retraction (in relation to the eye)? - correct answer involves bending light.
Rays by cornea and lens to focus on an image on the retina
What is the role of a photoreceptor? - correct answer convert light into electrical
impulses in a process called phototransduction.
, What is the function of a rod in the eye? - correct answer specialized for black and
white vision and shades of gray in dim light
Where are rods found in the eye? - correct answer periphery of the retina
What are cones in the eye? - correct answer specialized for sharp coloured vision
Where are cones in the eye found? - correct answer central fovea
How many chambers are in the anterior cavity of the eye? - correct answer 2
Anterior chamber - between cornea and iris
Posterior chamber- between iris and lense
What is the anterior cavity of the eye filled with - correct answer aqueous humor
(nourishes the lens and cornea)
Where is the posterior cavity of the eye located? - correct answer between the retina
and the lens
What is the function of the posterior eye cavity? - correct answer contains the vitreous
body, a jellylike substance that maintains the shape of the eye
What is the process of seeing? - correct answer refraction, accomodation, pupil
constriction/dilation and convergence
What is refraction? - correct answer cornea and lens involves bending light rays to
focus an image on the central fovea
What is accommodation (relating to vision) - correct answer changing the shape of the
lens to allow sharp focusing of light onto the retina
QUESTIONS AND CORRECT ANSWERS
What is the white of the eyeball called? - correct answer sclera
What is the function of the eyelid - correct answer protect from intensive light, harmful
particles, and trauma
What is the role of the lacrimal apparatus - correct answer produces tears to protect.
Eyeball and cornea against infection and dryness
What are the three tunics of the eye? - correct answer fibrous tunic, vascular tunic,
retina
What. Structures are involved with the fibrous tunic of the eye? - correct answer sclera
and cornea
What is the function of the neural tunic? - correct answer layer of photoreceptors that
change light into electrochemical signals that are then transported to the cns
What is the ciliary body? - correct answer smooth muscle attached to lens that changes
the shape according to light levels
What is the coloured part of the eye called? - correct answer iris
What is retraction (in relation to the eye)? - correct answer involves bending light.
Rays by cornea and lens to focus on an image on the retina
What is the role of a photoreceptor? - correct answer convert light into electrical
impulses in a process called phototransduction.
, What is the function of a rod in the eye? - correct answer specialized for black and
white vision and shades of gray in dim light
Where are rods found in the eye? - correct answer periphery of the retina
What are cones in the eye? - correct answer specialized for sharp coloured vision
Where are cones in the eye found? - correct answer central fovea
How many chambers are in the anterior cavity of the eye? - correct answer 2
Anterior chamber - between cornea and iris
Posterior chamber- between iris and lense
What is the anterior cavity of the eye filled with - correct answer aqueous humor
(nourishes the lens and cornea)
Where is the posterior cavity of the eye located? - correct answer between the retina
and the lens
What is the function of the posterior eye cavity? - correct answer contains the vitreous
body, a jellylike substance that maintains the shape of the eye
What is the process of seeing? - correct answer refraction, accomodation, pupil
constriction/dilation and convergence
What is refraction? - correct answer cornea and lens involves bending light rays to
focus an image on the central fovea
What is accommodation (relating to vision) - correct answer changing the shape of the
lens to allow sharp focusing of light onto the retina
