Which of the Following Best Describes the Mechanical Process of Normal

question 188

Multiple Choice

Which of the following best describes the mechanical process of normal breathing during expiration?

• A)The diaphragm relaxes and moves downward, while the intercostal muscles relax and move the ribs downward.
• B)The diaphragm contracts and moves upward, while the intercostal muscles relax and contract upward.
• C)The diaphragm relaxes and moves upward, while the intercostal muscles relax and move the ribs downward.
• D)The diaphragm relaxes and moves upward, while the intercostal muscles contract and move the ribs upward.