BNNS501 Exam 2 Questions Answered Right & Graded 2024/25
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Course
BNNS501
Institution
BNNS501
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 agai...
BNNS501 Exam 2 Questions Answered Right & Graded
2024/25
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
What is pupil constriction/dialation? - Correct Answer Of the smooth muscle of the iris that controls the
amount of light entering the eye and helps prevent scattering of light.
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