Videos
The cornea and the sclera compose the ______ layer
a. outer
b. middle
c. inner
d. gel
Introduction :
The cornea is a transparent structure of the eyes that covers the pupil, iris, and anterior chamber of the eyes. It refracts light with the anterior chamber and the lens. While Sclera (white part of the eye) is the fibrous, opaque, and protective layer of the eye that mainly contains collagen and some elastic fiber
Answer to Problem 1PL
Correct answer :
The correct answer is option (a) outer.
Explanation of Solution
Explanation/justification for the correct answer :
Option (a) outer. The cornea and the sclera compose the outer layer (fibrous tunic) of the eyes. Both are the connective tissues that contain collagen fibrils embedded in the proteoglycan rich extrafibrillar matrix. This dense connective tissue layer of cornea and sclera protects the eyeball and maintains its shape. So, the correct answer is option (a).
Explanation for incorrect answer :
Option (b) middle. The middle layer (vascular tunic) of the eyes is composed of the iris, choroid, and the ciliary body, which is responsible for the nourishment. So, this is an incorrect option.
Option (c) inner. The inner layer (nervous tunic) of the eyes is the layer of photoreceptors and the neurons. It is consists of the retina. So, this is an incorrect option.
Option (d) gel. Gel (vitreous) is found filled in the interior of the eyes that help the eyes to maintain a particular round shape. So, this is also an incorrect option.
Want to see more full solutions like this?
Chapter 35 Solutions
Laboratory Manual For Human Anatomy & Physiology
Additional Science Textbook Solutions
Genetic Analysis: An Integrated Approach (3rd Edition)
Biology: Life on Earth
Human Anatomy & Physiology (2nd Edition)
Essentials of Genetics (9th Edition) - Standalone book
Anatomy & Physiology: The Unity of Form and Function
Genetics: Analysis and Principles
- Night Blindness is caused by thedeficiency of Vitamin ______.A. KB. CC. B12D. Aarrow_forwardDamage to which of the following structures might produce hair cell loss? A.Basilar membrane B. Organ of Corti C. Reissner's membrane D. Scala tympani E. Scala vestibuliarrow_forwardA patient is not perceiving light touch on their ear. The problem could be in the integumentary system, peripheral nervous system or central nervous system. For each system, explain what would be going wrong that could cause this. How could you isolate the problem?arrow_forward
- _____ are found only in _____ skin, and detect skin deflection. a. Meissner’s corpuscles; hairy b. Merkel’s disks; glabrous c. hair receptors; hairy d. Krause end bulbs; hairyarrow_forwardMatch the function or definition to the structure: _____ A. Lens 1. Has pigment producing cells and blood vessels, keeps inside eye dark _____ B. sclera 2. The colored part of the eye, which controls amount of light entering _____ C. retina 3. Area where the nerve fibers from retina converge and leave eye _____ D. fovea centralis 4. Region of the retina that provides the sharpest vision _____ E. iris 5. Transparent structure found in eye and held in place by ligaments _____ F. optic disc 6. White portion of the eye is the outer layer _____ G. choroid coat 7. Inner layer of the eye which contains the photoreceptorsarrow_forwardThe arrangement of tunics in the eye, from the center of the eyeto the periphery, isa. retina, vascular, fibrous.b. vascular, retina, fibrous.c. vascular, fibrous, retina.d. retina, fibrous, vasculararrow_forward
- The papillary and reticular layers of the dermis arecomposed mainly of ________.a. melanocytesb. keratinocytesc. connective tissue d. adipose tissuearrow_forwardCiliary Body Conjunctiva Body of Iris Sclera Pupil Anterior chamber Anterior Suspensory ligaments cavity Posterior chamber Posterior cavity (vitreous chamber -A -C Retina E. A. F. B. G. C. D.arrow_forward28.) Light enters your eye through a transparent covering called the cornea. a. True b. Falsearrow_forward
- The helix terminates at the fatty inferior third of the ear also known as the A. Tragus B. Antihelix C. Crus D. Lobearrow_forwardThe fibrous tunic of the eye includes the a. conjunctiva. c. choroid. e. retina. b. sclera. d. iris.arrow_forwardWhat part is best examined for pallor? The major sign of iron deficiency anemia is pallor. Justify correct and incorrect answer. A. Palm B. Nail Beds C. Around the lips D. Lower conjunctival sacarrow_forward
Anatomy & PhysiologyBiologyISBN:9781938168130Author:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark WomblePublisher:OpenStax College
Medical Terminology for Health Professions, Spira...Health & NutritionISBN:9781305634350Author:Ann Ehrlich, Carol L. Schroeder, Laura Ehrlich, Katrina A. SchroederPublisher:Cengage Learning