Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

15. The Special Senses

Introduction to Special Senses

Anatomy & Physiology

15. The Special Senses

Introduction to Special Senses

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Problem 13d

Textbook Question

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
The cochlear duct is filled with perilymph.

Verified step by step guidance

Step 1: Understand the anatomy of the cochlear duct. The cochlear duct is a part of the inner ear located within the cochlea, and it plays a critical role in the process of hearing. It is one of three main chambers in the cochlea: the scala vestibuli, scala tympani, and cochlear duct (scala media).

Step 2: Identify the type of fluid present in the cochlear duct. The cochlear duct is filled with endolymph, a potassium-rich fluid, while the scala vestibuli and scala tympani are filled with perilymph, a sodium-rich fluid.

Step 3: Evaluate the statement provided. The statement claims that the cochlear duct is filled with perilymph. Based on the anatomy and physiology of the cochlear duct, this statement is false.

Step 4: Correct the false statement. The corrected statement should read: 'The cochlear duct is filled with endolymph.'

Step 5: Review the importance of distinguishing between endolymph and perilymph. These fluids have distinct ionic compositions that are essential for the function of hair cells in the cochlea, which convert sound vibrations into electrical signals for the brain.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Cochlear Duct

The cochlear duct, also known as the scala media, is a fluid-filled cavity within the cochlea of the inner ear. It is part of the auditory system and plays a crucial role in the process of hearing by housing the organ of Corti, which contains hair cells that transduce sound vibrations into neural signals.

Perilymph vs. Endolymph

Perilymph and endolymph are two distinct types of fluids found in the inner ear. Perilymph fills the space between the bony labyrinth and the membranous labyrinth, while endolymph is found within the cochlear duct. The presence of these fluids is essential for the proper functioning of the auditory and vestibular systems.

True/False Statements in Science

In scientific contexts, true/false statements are used to assess understanding of factual information. When a statement is marked as false, it is important to provide a corrected version that accurately reflects scientific knowledge. This process reinforces learning and ensures clarity in understanding complex concepts.