Pearson eText Human Anatomy -- Instant Access (Pearson+)
Pearson eText Human Anatomy -- Instant Access (Pearson+)
9th Edition
ISBN: 9780135273005
Author: Elaine Marieb, Patricia Wilhelm
Publisher: PEARSON+
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Chapter 16, Problem 5CRCAQ
Summary Introduction

To review:

The cause of blindness of premature babies who were born before 25 weeks after conception.

Introduction:

The outermost covering of the eye is known as sclera and the cornea. The cornea forms a dome-shaped structure at the front side of the eye. The inner layer of the eye is the retina that includes rod and cone photoreceptor cells. These cells provide vision at different intensities of light. Various types of disorders are associated with vision and some of them are related to age while others are related to other reasons. Some of the common disorders that are associated with visualization are cataract, glaucoma, and some other conditions that are associated with accommodation.

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Research suggests that newborns are able to discriminate their own language from a foreign language, and their mother's voice from a stranger's voice. In contrast, their visual abilities are much less developed at birth, and develop rapidly over the first few months of life. One explanation for this is: A) Fetuses get equivalent auditory and visual experience before birth, but before they are born they are only able to learn from auditory experience B) Fetuses do not experience sensory information before birth (i.e., they cannot hear, see, smell, etc.) but language develops faster than vision because it is more evolutionarily important C) Fetuses get equivalent auditory and visual experience before birth, but vision requires additional postnatal triggers to be fully activated D) Fetuses can hear many types of sounds prenatally but have limited visual experience until after birth.
You are watching the stars at night, and you never seem to be looking at the right spot to catch the brightest meteors. Which of the following might explain this? a)Your fovea contains mostly cones; thus you see dim light especially well when looking right at it. b)Your peripheral retina contains more rods, which are more sensitive to dim light than cones; thus objects in your peripheral vision appear brighter in dim light situations. c)Detection of light depends mostly on its color rather than intensity; thus cones play a larger role in detection of light in dim light situations. d) all of the above.     ( well explain  the correct  answer  and type answer).
Grandpa can't ever seem to hear what his little granddaughters say. He also can't hear that high-pitched whine in the Subaru engine that everyone else seems to hear. You suspect that grandpa     has too much ear wax built up in his external auditory canal, and therefore has developed conduction deafness     has damage to the vestibulocochlear nerve     has damaged either the utricle or the saccule, though it will be hard to tell which one without further testing     has damaged the hair cells closest to the oval window     has "selective" hearing loss, because the granddaughters are always trying to get him to play with them when he's tired, and he doesn't want to work on that darned car anymore either.

Chapter 16 Solutions

Pearson eText Human Anatomy -- Instant Access (Pearson+)

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