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Lens (anatomy): Quiz

  

Question 1: In fish and ________, the lens is fixed in shape, and focussing is instead achieved by moving the lens forwards or backwards within the eye.
BirdAmphibianReptileChordate

Question 2:
How do you write Lens (anatomy) in latin?
Dioecesis Segobiensis
lens crystallina
processus uncinatus pancreatis
Dioecesis Iomchiavensis

Question 3: In ________, there are two muscles, one above and one below the lens, while other amphibians have only the lower muscle.
True toadFrogMicrohylidaePoison dart frog

Question 4: In reptiles and ________, the ciliary body touches the lens with a number of pads on its inner surface, in addition to the zonular fibres.
ArchaeopteryxModern birdsBirdEnantiornithes

Question 5: As mature lens fibers do not have ________, approximately 80% of the glucose is metabolized via anaerobic respiration.
MitochondrionPyruvate dehydrogenase complexMitochondrial DNASuccinate dehydrogenase

Question 6: ________ is the age-related loss of accommodation, which is marked by the inability of the eye to focus on nearby objects.
HyperopiaPresbyopiaAstigmatism (eye)Myopia

Question 7: In the most primitive vertebrates, the lampreys and ________, the lens is not attached to the outer surface of the eyeball at all.
CraniataChordateHagfishAnnelid

Question 8: Mature lens fibers have no ________ or nuclei.
OrganelleCell (biology)ChloroplastMitochondrion

Question 9: There is no aqueous humour in these fish, and the vitreous body simply presses the lens against the surface of the ________.
ScleraIris (anatomy)RetinaCornea

Question 10: The lens, by changing shape, functions to change the ________ of the eye so that it can focus on objects at various distances, thus allowing a sharp real image of the object of interest to be formed on the retina.
Digital photographyHolographyApertureFocal length
















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