The prime mover of inspiration is the a. diaphragm, b. internal intercostals, c. external intercostals, d. abdominal wall muscles.

Verified step by step guidance

1. Identify the primary function of inspiration in the respiratory process.
2. Understand the role of the diaphragm in the process of inspiration.
3. Consider the function of the internal intercostals and how they relate to expiration rather than inspiration.
4. Evaluate the role of the external intercostals in assisting the diaphragm during inspiration.
5. Analyze the function of the abdominal wall muscles and their involvement in forced expiration rather than inspiration.

Key Concepts

Respiratory Muscles

Respiratory muscles are essential for the mechanics of breathing. They include the diaphragm, intercostal muscles, and abdominal muscles, which work together to facilitate inhalation and exhalation. Understanding their roles helps in identifying which muscle is primarily responsible for inspiration.

Inspiration Mechanics

Inspiration is the process of drawing air into the lungs, primarily achieved by the contraction of the diaphragm and external intercostal muscles. This contraction increases the thoracic cavity's volume, creating a negative pressure that allows air to flow in. Recognizing the mechanics of inspiration is crucial for answering the question.

Diaphragm Function

The diaphragm is the primary muscle of inspiration, located beneath the lungs. When it contracts, it flattens and moves downward, increasing the thoracic cavity's volume and reducing pressure, which draws air into the lungs. Its role as the main driver of inspiration makes it a key focus in respiratory physiology.