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During inhalation, the diaphragm contracts and flattens. What effect does this have on the volume and pressure within the thoracic cavity?
  • a)
    Volume decreases, pressure increases
  • b)
    Volume decreases, pressure decreases
  • c)
    Volume increases, pressure increases
  • d)
    Volume increases, pressure decreases
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
During inhalation, the diaphragm contracts and flattens. What effect d...
During inhalation, the diaphragm contracts and moves downward, causing it to flatten. This results in an increase in the volume of the thoracic cavity. According to Boyle's law, an increase in volume leads to a decrease in pressure. Therefore, the pressure within the thoracic cavity decreases during inhalation, creating a pressure gradient that allows air to flow into the lungs.
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