Which of the Following Is/are a Primary Respiratory Muscle(s)for Inhalation

Question

Which of the following is/are a primary respiratory muscle(s)for inhalation?
A) rectus abdominis
B) external oblique muscle
C) internal intercostal muscles
D) transversus thoracis muscle
E) external intercostal muscles

Accepted Answer

The external intercostal muscles are the primary respiratory muscles for inhalation. They are responsible for elevating the ribcage and expanding the volume of the thoracic cavity, which leads to air being drawn into the lungs. The rectus abdominis, external oblique muscle, internal intercostal muscles, and transversus thoracis muscle are not directly involved in inhalation.