Sense Organs - Get Instant Homework | Assignment Help

Answer the following questions using ONLY the powerpoint attached.

1. Mention 4 pathological conditions of the eye, define them, explain the signs, symptoms, diagnosis, and treatment of each one.

2. Divide the following terms, label the component parts and give the meaning of the medical term:

a. hemianopsia

b. anisoconea

c. conjunctivitis

d. meringotomy

e. tympanoplasty

3. Two symptoms of the at that can occur alone or in conjunction with other conditions are Tinnitus and Vertigo. Explain what each condition means (in one paragraph each)

4. Mention three medical terms that have the suffix -opia and two medical terms with the suffic -cusis. Divide them, label them and give their meaning.

5. What is tonometry, slit lamp microscopy, LASIK, vitrectomy, cochlear implants and audiometry. Explain
Chapter 17
Sense Organs: The Eye and the Ear

Learning Objectives

Identify locations and functions of the major parts of the eye and ear.
Name the combining forms, prefixes, and suffixes most commonly used to describe these organs and their parts.
Describe the pathologic conditions that may affect the eye and ear.
Copyright © 2008, 2005 by Saunders, an imprint of Elsevier Inc. All rights reserved.

Learning Objectives (cont’d.)

Identify clinical procedures that pertain to ophthalmology and otology.
Apply your new knowledge to understanding medical terms in their proper contexts, such as medical reports and records.
Copyright © 2008, 2005 by Saunders, an imprint of Elsevier Inc. All rights reserved.

Chapter 17
Lesson 17.1

Introduction

Light and sound applied to the sense organs of the eye and ear activate receptors that send signals to the appropriate brain regions in the cortex where they are translated into images and sounds.

What types of receptors exist to process information about our environment?

The Eye

What are the parts of the eye labeled in the diagram?

What are the functions of the different parts of the eye?

See Vocabulary (pp. 674-676) for definitions of the parts of the eye and their functions.

The Eye

What are the parts of the eye labeled in the diagram?

What are the functions of the different parts of the eye?

See Vocabulary (pp. 674-676) for definitions of the parts of the eye and their functions.

The Eye (cont’d.)

Pupil
Conjunctiva
Cornea
Sclera
Choroid
Iris
Ciliary body
Lens
Fundus
Anterior chamber
Aqueous humor
Vitreous chamber
Vitreous humor
Retina
Optic nerve
Optic disc
Macula
Fovea centralis
Copyright © 2008, 2005 by Saunders, an imprint of Elsevier Inc. All rights reserved.

Why are corneal transplants often successful?

How many cones and rods are in the retina? (There are approximately 6.5 million cones and 120 million rods in the retina.)

There are three types of cones, each stimulated by one of the primary colors of light (red, blue, and green).

Which cones are most affected by color blindness? (either the red or green cones)

Visual Pathways From Retina to Cortex

Describe how light travels through the eye by following the pathways of the color coordinated tracts and visual fields.

What might happen if there are lesions in areas along the pathway leading to the right and left cerebral cortices?

Lesions of the cortical areas of the occipital lobe will likewise cause visual disturbance in the areas of the visual field where the information is normally interpreted by the brain.

See Figure 17-5 (p. 674) for pathway of light rays from cornea to cerebral cortex.

QUICK QUIZ:

The soft, jelly-like material behind the lens in the vitreous chamber; helps maintain the shape of the eyeball….

sclera

vitreous humor

aqueous humor

fovea centralis

CORRECT Answer is B, vitreous humor

STRUCTURES AND FLUIDS

aque/o water
blephar/o eyelid
conjunctiv/o conjunctiva
cor/o pupil
corne/o cornea
cycl/o ciliary body
Combining Form Meaning