Textbook Question
Where are the olfactory sensory neurons, and why is that site poorly suited for their job?
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Ch. 15 The Special Senses
Marieb, Hoehn11th EditionHuman Anatomy & PhysiologyISBN: 9780136874034
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Table of contents
- Ch. 1 The Human Body: An Orientation24
- Ch. 2 Chemistry Comes Alive25
- Ch. 3 Cells: The Living Units21
- Ch. 4 Tissue: The Living Fabric20
- Ch. 5 The Integumentary System11
- Ch. 6 Bones and Skeletal Tissues19
- Ch. 7 The Skeleton14
- Ch. 8 Joints7
- Ch. 9 Muscles and Muscle Tissue26
- Ch. 10 The Muscular System26
- Ch. 11 Fundamentals of the Nervous System and Nervous Tissue19
- Ch. 12 The Central Nervous System26
- Ch. 13 The Peripheral Nervous System and Reflex Activity32
- Ch. 14 The Autonomic Nervous System19
- Ch. 15 The Special Senses26
- Ch. 16 The Endocrine System23
- Ch. 17 Blood25
- Ch. 18 The Cardiovascular System: The Heart24
- Ch. 19 The Cardiovascular System: Blood Vessels27
- Ch. 20 The Lymphatic System and Lymphoid Organs and Tissues14
- Ch. 21 The Immune System: Innate and Adaptive Body Defenses27
- Ch. 22 The Respiratory System21
- Ch. 23 The Digestive System31
- Ch. 24 Nutrition, Metabolism, and Energy Balance26
- Ch. 25 The Urinary System26
- Ch. 26 Fluid, Electrolyte, and Acid-Base Balance24
- Ch. 27 The Reproductive System24
- Ch. 28 Pregnancy and Human Development25
- Ch. 29 Heredity11
Marieb, Hoehn11th EditionHuman Anatomy & PhysiologyISBN: 9780136874034Not the one you use?Change textbook
Chapter 15, Problem 21
Which of the following is not a possible cause of conduction deafness?
a. Impacted cerumen
b. Middle ear infection
c. Cochlear nerve degeneration
d. Otosclerosis
Verified step by step guidance1
Step 1: Understand the difference between conduction deafness and sensorineural deafness. Conduction deafness occurs when sound waves are blocked from reaching the inner ear, often due to problems in the outer or middle ear. Sensorineural deafness involves damage to the inner ear or auditory nerve.
Step 2: Analyze each option to determine if it affects the conduction of sound through the outer or middle ear (which would cause conduction deafness) or if it affects the inner ear or nerve (which would cause sensorineural deafness).
Step 3: Impacted cerumen (earwax) can block the ear canal, preventing sound waves from reaching the eardrum, so it is a cause of conduction deafness.
Step 4: Middle ear infection can cause fluid buildup or damage to the ossicles, interfering with sound conduction, so it is also a cause of conduction deafness.
Step 5: Cochlear nerve degeneration affects the auditory nerve, which is part of the inner ear pathway, so it is not a cause of conduction deafness but rather sensorineural deafness. Otosclerosis involves abnormal bone growth in the middle ear, affecting sound conduction, so it causes conduction deafness.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Conduction Deafness
Conduction deafness occurs when sound waves are blocked from reaching the inner ear, often due to problems in the outer or middle ear. Common causes include earwax buildup, infections, or abnormalities in the ossicles, which prevent efficient sound transmission.
Recommended video:
Guided course
7:14
Conduction Pathway and Contraction
Sensorineural Deafness
Sensorineural deafness results from damage to the inner ear structures or the auditory nerve, such as cochlear nerve degeneration. This type of hearing loss affects the conversion of sound waves into nerve signals or their transmission to the brain.
Common Causes of Conduction Deafness
Impacted cerumen, middle ear infections, and otosclerosis are typical causes of conduction deafness. These conditions interfere with sound conduction through the ear canal or middle ear bones, unlike cochlear nerve degeneration, which affects the neural pathway.
Recommended video:
Guided course
7:14Conduction Pathway and Contraction
Related Practice
Textbook Question
Pitch is to frequency of sound as loudness is to
a. Quality
b. Intensity
c. Overtones
d. All of these
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Textbook Question
Which of the following is important in maintaining the balance of the body?
a. Visual cues
b. Semicircular canals
c. The saccule
d. Proprioceptors
e. All of these
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