As a professional, I am here to provide an informative article on which muscle contracts during forced expiration quizlet. Forced expiration is when air is forcefully pushed out of the lungs, and it requires the use of specific muscles. The primary muscle responsible for forced expiration is the abdominal muscle.
During forced expiration, the muscles in the abdominal wall contract and push the diaphragm upward. This movement causes the lungs to deflate and air to be expelled from the body. The abdominal muscle, also known as the rectus abdominal muscle, is a long, flat muscle that extends from the rib cage down to the pelvis.
The abdominal muscle is involved in other bodily functions, such as coughing, sneezing, and laughing. These actions require the use of the diaphragm and other muscles in the chest and abdominal region. However, during forced expiration, the abdominal muscle is the primary muscle responsible for expelling air from the lungs.
It is important to note that the abdominal muscle alone cannot force all the air out of the lungs. The muscles in the chest, such as the internal intercostal muscles, also contract, helping to compress the lungs and push air out of the body. These muscles work together to ensure that the lungs are emptied completely, allowing for effective gas exchange during inhalation.
In conclusion, the abdominal muscle is the primary muscle responsible for forced expiration, as it contracts and pushes the diaphragm upward, deflating the lungs and expelling air from the body. However, it is important to note that other muscles in the chest and abdominal region also play a role in forced expiration, and they work together to ensure effective gas exchange during inhalation.