Ascent to Altitude or Descent from Altitude Is Often Accom

question 8

Multiple Choice

Ascent to altitude or descent from altitude is often accom panied by periods of reduced hearing
sensitivity, crackling sounds and return to norm al sensitivity. This is due to

• A) Swelling of the cochlear fluid with reduced external pressure
• B) Movement of the oval window as the cochlea unwinds
• C) Bulging of the round window with reduced external pressure
• D) Movement of the tympanic membrane with unequal pressure between the middle ear
• and outer ear
• E) Different states of contractions of the stapedius muscle and tensor tympani

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Definitions:

Diaphragm

A dome-shaped muscular barrier between the thoracic cavity and abdominal cavity that plays a crucial role in breathing.

Stomach

A muscular organ in the digestive system that breaks down food using acids and enzymes, preparing it for further digestion in the intestines.

Mechanical Breakdown

The failure of a machine or device due to the wear and tear of its components or improper use.

Chemical Breakdown

The method of breaking down a substance into its basic elements or simpler compounds by means of chemical reactions.