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Andrearcarter95 Andrearcarter95
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7 years ago
The diaphragm plays a major role in respiration. During inhalation, the diaphragm:
 
  a. elongates and descends into the abdomen, allowing air to enter the lungs.
  b. contracts and creates a negative pressure in the thorax, which draws air into the lungs.
  c. relaxes so that it can be stretched as you pull air into the lungs.
  d. contracts and increases internal thoracic pressure, which sucks air into the lungs.

Question 2

The thorax is enclosed by the:
 
  a. ribs, sternum, thoracic spine, and diaphragm.
  b. ribs, clavicles, diaphragm, and mediastinum.
  c. thoracic vertebrae, diaphragm, mediastinum, and clavicles.
  d. clavicles, sternum, diaphragm, and thoracic spine.
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#1
7 years ago
Answer to q. 1

Answer: b

Answer to q. 2

Answer: a
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