Which of the following statements best describes the process that occurs when air is inhaled into the lungs?
A) The diaphragm moves up, the lungs expand, pressure decreases, and air is inhaled.
B) The diaphragm moves down, the lungs expand, pressure decreases, and air is inhaled.
C) The diaphragm moves up, the lungs contract, pressure increases, and air is inhaled.
D) The diaphragm moves down, the lungs expand, pressure increases, and air is inhaled.
E) The diaphragm moves down, the lungs contract, pressure decreases, and air is inhaled.

Question

Quizplus · Accepted Answer

The diaphragm is a muscle that contracts (moves down) during inhalation, causing the volume of the thoracic cavity (which contains the lungs) to increase. This increase in volume leads to a decrease in pressure within the thoracic cavity, causing air to flow into the lungs. Therefore, the correct statement is: The diaphragm moves down, the lungs expand, pressure decreases, and air is inhaled.

Which of the Following Statements Best Describes the Process That