SEELEY'S ANATOMY+PHYSIOLOGY
12th Edition
ISBN: 9781260172195
Author: VanPutte
Publisher: RENT MCG
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Chapter 15, Problem 17RAC
Summary Introduction
Introduction:
Visual acuity is referred to as the ability of an individual to focus an image on the retina to perceive the clear image of the object. The factors that affect visual acuity are:
- The shape of the eyeball.
- The flexibility of the lens.
There occur many types of visual acuity defects such as myopia, hyperopia, presbyopia and astigmatism.
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The ability of your eyes to focus diffrentially for obejcts of near vision (less than 20ft) is called ______.
A.
presbyopia
B.
accomodation
C.
visual acuity
D.
refractive index
For individuals that focuses an image in front of the retina, meaning they can see close objects normally, but distant objects are blurred or seen indistinctly, this condition is called _______.
A.
myopia
B.
emmetropic
C.
hyperopia
D.
presbyopia
Irregularities in the curvatures of the lens and/or the cornea that lead to blurred vision problem is called ______.
A.
depth perception
B.
refraction
C.
emmetropic
D.
astigmatism
Match 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 photoreceptors
Myopia is a condition in which a person has:
a. light rays focusing in front of the retina due to a flattened cornea
b. light rays focusing in front of the retina due to a short eyeball
c. light rays focusing in front of the retina due to a cornea that is too curved
d. light rays focusing in front of the retina due to a detached retina
Chapter 15 Solutions
SEELEY'S ANATOMY+PHYSIOLOGY
Ch. 15.1 - Where are olfactory neurons located? Explain their...Ch. 15.1 - Describe the initiation of an action potential in...Ch. 15.1 - What is unique about olfactory neurons with...Ch. 15.1 - Where are the central olfactory cortex areas...Ch. 15.2 - Name and describe the four kinds of papillae on...Ch. 15.2 - Describe the structure of a taste bud.Ch. 15.2 - What are the five primary tastes? Describe how...Ch. 15.2 - Prob. 8AYPCh. 15.2 - How is the sense of taste related to the sense of...Ch. 15.3 - Prob. 10AYP
Ch. 15.3 - How do the conjunctiva,lacrimal apparatus, and...Ch. 15.3 - Prob. 12AYPCh. 15.3 - How does the pupil constrict? How does it dilate?Ch. 15.3 - Prob. 14AYPCh. 15.3 - Name the three chambers of the eye and the...Ch. 15.3 - Prob. 16AYPCh. 15.3 - Prob. 17AYPCh. 15.3 - Prob. 18AYPCh. 15.3 - Prob. 19AYPCh. 15.3 - Prob. 20AYPCh. 15.3 - Prob. 21AYPCh. 15.3 - Distinguish among myopia, hyperopia. and...Ch. 15.3 - Prob. 23AYPCh. 15.3 - Describe the changes that occur in a rod cell...Ch. 15.3 - Prob. 25AYPCh. 15.3 - Prob. 26AYPCh. 15.3 - Prob. 27AYPCh. 15.3 - Prob. 28AYPCh. 15.3 - Prob. 29AYPCh. 15.3 - Starting with the optic nerve, trace the action...Ch. 15.3 - Prob. 31AYPCh. 15.4 - Name the three regions of the ear, and list each...Ch. 15.4 - Describe the relationship among the tympanic...Ch. 15.4 - What are the functions of the external auditory...Ch. 15.4 - Explain how the membranous labyrinth of the...Ch. 15.4 - Describe the structure of the spiral organ.Ch. 15.4 - Explain the differences between inner and outer...Ch. 15.4 - Relate how tip links function.Ch. 15.4 - Prob. 39AYPCh. 15.4 - Contrast volume, pitch, and timbre.Ch. 15.4 - Starting with the auricle, trace a sound wave into...Ch. 15.4 - What is the importance of the sound attenuation...Ch. 15.4 - Prob. 43AYPCh. 15.4 - Describe the neuronal pathways for hearing, from...Ch. 15.4 - Prob. 45AYPCh. 15.4 - Prob. 46AYPCh. 15.4 - What is dynamic equilibrium? Whatstructures are...Ch. 15.4 - Prob. 48AYPCh. 15.4 - Prob. 49AYPCh. 15.5 - Prob. 50AYPCh. 15 - Which of these statements is not true with respect...Ch. 15 - Prob. 2RACCh. 15 - Which of these is not one of the basic tastes? a....Ch. 15 - Which of these types of papillae have no taste...Ch. 15 - Prob. 5RACCh. 15 - The ciliary body a. contains smooth muscles that...Ch. 15 - Prob. 7RACCh. 15 - Prob. 8RACCh. 15 - Prob. 9RACCh. 15 - Prob. 10RACCh. 15 - Prob. 11RACCh. 15 - Prob. 12RACCh. 15 - Prob. 13RACCh. 15 - In the retina cones that are most sensitive to a...Ch. 15 - Given these areas of the retina: (1) macula (2)...Ch. 15 - Prob. 16RACCh. 15 - Prob. 17RACCh. 15 - Which of these structures is found within or is...Ch. 15 - Prob. 19RACCh. 15 - Prob. 20RACCh. 15 - Prob. 21RACCh. 15 - Prob. 22RACCh. 15 - Prob. 23RACCh. 15 - Prob. 24RACCh. 15 - Damage to the semicircular canals affects the...Ch. 15 - Prob. 1CTCh. 15 - Perhaps you have heard that eating carrots is good...Ch. 15 - A man stares at a black clock on a white wall for...Ch. 15 - Prob. 4CTCh. 15 - Prob. 5CTCh. 15 - Prob. 6CTCh. 15 - Professional divers are subject to increased...Ch. 15 - If a vibrating tuning fork is placed against the...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Myopia is a condition in which a person has Select one: a. light rays focusing in front of the retina due to a flattened cornea b. light rays focusing in front of the retina due to a short eyeball c. light rays focusing in front of the retina due to a cornea that is too curved d. light rays focusing in front of the retina due to a detached retinaarrow_forwardWhen reading, a person with astigmatism sees some lines in sharp focus while others appear blurred. Astigmatism is caused by the a. inability of the iris to contract or dilate b. lens becoming cloudy and rigid c. number of cones on some parts of the retina being deficient d. curvature of the cornea or lens not being symmetricalarrow_forward_____causes the pupil to widen. a. Low light b. Bright lightarrow_forward
- When reading, a person with astigmatism sees some lines in sharp focus while others appear blurred. Astigmatism is caused by the Select one: a. inability of the iris to contract or dilate b. lens becoming cloudy and rigid c. number of cones on some parts of the retina being deficient O d. curvature of the cornea or lens not being symmetricalarrow_forwardHyperopia is a condition in which the eye cannot view close objects clearly. Many newborns have hyperopia. Compared to older adults, the lenses of a newborn baby are very light and flexible. Hyperopia in newborn babies is caused by a. the inability of the iris to adjust to changing light conditions b. uneven curvature of the cornea c. loss of lens flexibility d. weak ciliary muscles that do not pull adequately on the lensarrow_forwardWhen you view a close object, your lens gets_____ . a. flatter c. darker b. rounder d. cloudierarrow_forward
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