During Exercise, Which of the Following Contract for Active Exhalation

Question

During exercise, which of the following contract for active exhalation?
A) rectus abdominis and internal intercostal muscles
B) diaphragm and internal intercostal muscles
C) rectus abdominis and diaphragm muscles
D) diaphragm and external intercostal muscles
E) pectoralis major and serratus anterior muscles

Accepted Answer

The rectus abdominis and internal intercostal muscles contract during active exhalation. The rectus abdominis helps to pull the ribs down, while the internal intercostal muscles help to decrease the volume of the thoracic cavity by pulling the ribs together.