WorksheetsThoracic Wall and Respiratory Muscles Quiz
Total questions: 10
Worksheet time: 5mins
What is the primary muscle involved in normal respiration?
Internal intercostal
Diaphragm
Sternocleidomastoid
Transversus thoracis
Which muscles are primarily active during forced expiration?
Scalene
Serratus anterior
Internal intercostals
External intercostals
What is the function of the serratus posterior superior muscle?
Depresses ribs
Elevates ribs 2-4
Stabilizes the diaphragm
Supports abdominal muscles
Which structure passes through the aortic hiatus of the diaphragm?
Inferior vena cava
Esophagus
Aorta
Phrenic nerve
What happens to the thoracic cavity during inspiration?
Volume increases
Diaphragm relaxes
Pressure increases
Volume decreases
Which muscle is NOT considered an accessory muscle of respiration?
Serratus anterior
Sternocleidomastoid
Rectus abdominis
Pectoralis major
What is the role of the internal intercostal muscles during expiration?
Stabilize the diaphragm
Depress ribs
Assist in inhalation
Elevate ribs
Which of the following muscles is involved in forced inspiration?
Serratus posterior inferior
Scalene
Subcostals
Transversus thoracis
What is the primary action of the diaphragm during quiet inspiration?
Flattens
Elevates ribs
Contracts abdominal muscles
Expands thoracic cavity
Which nerve innervates the diaphragm?
Accessory nerve
Intercostal nerve
Phrenic nerve
Vagus nerve
