206 Senses System Worksheet Key

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North Carolina State University *

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206

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Mechanical Engineering

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Apr 3, 2024

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docx

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ANS 206 Senses System Worksheet (10 points) Name _______TA KEY______________________________ Section_________TAs__________ 1. What are the three parts of the ear? Identify which portion(s) are air-filled or water-filled. (1 point) Outer (air) don’t have to say “air,” it is implied, can also say “external” Middle (air) Inner (fluid) can also say “internal” -0.33 for each wrong, for inner and middle they MUST have fluid and air for full credit, respectively. 2. Name the anatomic structures that collectively form the membranous labyrinth. (1 point) Utricle, saccule, semicircular canals, cochlea (can also say “cochlear duct” or “semicircular ducts”) -0.25 for each wrong or missing, must have all FOUR 3. List five things that contribute to the transparency of the cornea. (2 points) Lack of pigment Lack of vascular elements Relative dehydration of collagenous tissue Smooth optical surface Laminar pattern of collagen -0.4 for every wrong or missing, must list FIVE 4. ______ Rods ______ sense black and white and are more numerous in ____ domestic mammals _______. ____ Cones _____ sense color and are more numerous in _ birds __________. (1 point) -0.25 for each wrong blank
5. Name the three auditory ossicles and the items they resemble, respectively. (1 point) Malleus – Hammer Incus – Anvil Stapes - Stirrup -0.33 for each incorrect, must all be right In the case they name the ossicles all correctly but don’t include the shape/item they resemble, -0.5 for whole question 6. Label the following parts of the eye: Cornea, Pupil, Iris, Lens, Vitreous Humor, Optic Nerve, Sclera, Choroid, Retina. (2 points) -0.22 for each incorrect blank Sclera Lens Retina Cornea Pupil Iris Optic Nerve Choroid Vitreous Humor
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