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BNNS501 Second Exam Study Guide with Complete Solutions

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  • 2024/2025
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BNNS501 Second Exam Study Guide with Complete Solutions Accommodation - Ans:-change in the curvature of the lens to adjust to distance of objects anterior cavity - Ans:-Cavity anterior to the lens which is filled with aqueous humor to nourish the lens and cornea Binocular Vision - Ans:-Both ey...

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  • October 23, 2024
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  • 2024/2025
  • Exam (elaborations)
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  • 2024/2025
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BNNS501 Second Exam Study Guide with
Complete Solutions


Accommodation - Ans:✔✔-change in the curvature of the lens to adjust to distance of objects


anterior cavity - Ans:✔✔-Cavity anterior to the lens which is filled with aqueous humor to nourish the

lens and cornea


Binocular Vision - Ans:✔✔-Both eyes move to look at the same object


Choroid - Ans:✔✔-Part of the vascular layer which absorbs scattered light in the eye and maintains a

clear/sharp image.


Cones - Ans:✔✔-Photoreceptors that are specialised for sharp vision


Conjunctiva - Ans:✔✔-Thin protective mucous membrane that lines the inner aspect of the eyelids


Convergence of eyes - Ans:✔✔-Medial movement of eyes to focus both eyes on an object.


Cornea - Ans:✔✔-Transparent protective outer layer that covers the iris


fibrous tunic - Ans:✔✔-Outer tunic of the eye, contains the sclera and cornea


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Fovea Centralis - Ans:✔✔-Cones-only area at the centre of the macula lutea which is the area of highest

visual resolution


Inner tunic - Ans:✔✔-Inside tunic that consists of the retina


iris - Ans:✔✔-Coloured portion of the eye which regulates the amount of light entering the eye.


Lacrimal Fluid - Ans:✔✔-The name for tears which protect, clean, moisten and lubricate the eyeball.

contains lysozyme.


Macula Lutea - Ans:✔✔-Exact centre of the posterior retina


Optic Disc - Ans:✔✔-Site where the optic nerve exits the eye, also known as blind spot


Posterior cavity - Ans:✔✔-Cavity that lies between lens and retina. it contains a jelly-like substance to

maintain eye shape


Pupil - Ans:✔✔-Hole in the middle of the eye that allows light into the eye


Refraction - Ans:✔✔-Bending of light rays as they move from one medium to another of different density


Retina - Ans:✔✔-Inside membrane that consists of photoreceptors (rods and cones)


Rods - Ans:✔✔-Photoreceptors that are specialised for black and white vision, as well as shapes and

movement



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Sclera - Ans:✔✔-White of the eye that provides shape and support to the eyeball


vascular tunic - Ans:✔✔-Middle tunic of the eye, contains the choroid, ciliary body and the iris.


Auricle/Pinnna - Ans:✔✔-Elastic cartilage covered with skin that directs sounds waves towards the

tympanic membrane


Basilar membrane - Ans:✔✔-lower membrane of the cochlea duct


Cochlea - Ans:✔✔-Small, snail-shaped organ of the ear that contains the receptors for hearing


Dynamic Equilibrium - Ans:✔✔-Maintenance of the head position during sudden movements such as

rotation, acceleration and deceleration


Endolymoh - Ans:✔✔-Fluid that conducts sound vibrations and responds to mechanical forces located in

the membranous labyrinth


Equilibrium - Ans:✔✔-The state of being balanced and refers to head position in relation to the body.


External Auditory Cnal - Ans:✔✔-Curved tube of cartilage and bone leading to the temporal bone


External ear - Ans:✔✔-Structure that collects sound waves


Internal ear - Ans:✔✔-Structure that contains the receptors for hearing and equilibrium


middle ear - Ans:✔✔-structure that contains the 3 auditory ossicles, oval and round window


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