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BIO 335 - Anatomy Final Exam- Questions with 100% Correct Answers
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BIO 335 - Anatomy Final Exam-Questions with 100% Correct
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structures of the eye - Answer fibrous tunic (sclera, cornea), vascular tunic (iris with
pupillary muscles, ciliary body with muscles and suspensory ligaments, choroid
plexus), eye chambers (anterior cavity of ant/post chambers and posterior cavity)
fibrous tunic - Answer - function: mechanical support, protection, muscle
attachment, focusing
sclera - Answer "eye white" made of tough collagen and elastic fibers (vascular)
cornea - Answer transparent part of sclera made of collagen in layers (avascular)
vascular tunic - Answer layer of vascular structures between fibrous and neural tunics
that functions to regulate amount of light, secrete/absorb aqueous humor, and
control lens shape for focusing
iris - Answer 2 layer (stroma= CT with melanin, iris pigment epithelium/IPE= cuboidal ET
to scatter light) pigmented ring of smooth muscle that functions to regulate light
entering the eye (pupillary constrictor= concentric SM cells, pupillary dilator= spoke-like
myoepithelial cells)
, ciliary body - Answer structure surrounding the lens made of muscles and attachments
(connected via suspensory ligaments) that functions to focus the lens
choroid - Answer dark pigmented layer of the posterior eye that is richly vascular
and function to supply the retina with o2 and nutrients
neural tunic - Answer layer of the eye that contains nervous tissue, namely the
retina and functions to transduce light
retina - Answer photoreceptors (rods and cones), bipolar cells, ganglion
cells, interneurons (horizontal cells, amacrine cells, interplexiform cells)
anterior cavity - Answer space located in front of the lens that contains and
produces aqueous humor that functions to nourish and maintain shape (contains
anterior and posterior chambers separated by iris)
posterior cavity - Answer space located behind the lens that contains vitreous
humor which functions to maintain eye shape and retina contact
lens - Answer concentric layers of transparent cells that functions to focus light
onto neural tissue/retina by changing shape
accomodation of lens - Answer adjustability of the lens in response to ciliary body and
suspensory ligaments (near vision= relax SL, contract CB, round lens), (far vision=
relax CB, contract SL, flat lens)
events required to focus an image - Answer 1. accommodation by lens (changes
shape of lens),
2. constriction of pupil (changes focus by directing more through center of lens),
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