The process of inspiration occurs as?
Correct answer: A. Lungs pull air inside
- A. Lungs pull air inside
- B. Passive transport of air takes place
- C. Passive expansion of air takes place
- D. Air is pushed inside
Explanation
Lungs pull air inside: This option is correct. During inspiration, the expansion of the thoracic cavity occurs passively due to the contraction of the diaphragm and the external intercostal muscles. This expansion leads to a decrease in intra-thoracic pressure, causing air to flow into the lungs.
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About Human Respiratory System
The human respiratory system conducts air to the alveoli, where oxygen and carbon dioxide exchange occurs across thin respiratory surfaces. Questions cover the nasal passage, trachea, bronchi, lungs, diaphragm and intercostal muscles, ventilation mechanics and gas transport, while distinguishing breathing and gaseous exchange from cellular respiration.
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