#1
Which of the following structures is NOT part of the thoracic wall?
Rib
Vertebra
Clavicle
Sternum
#2
Which muscle is primarily responsible for inspiration during quiet breathing?
Internal intercostals
External intercostals
Diaphragm
Serratus anterior
#3
Which of the following structures separates the thoracic cavity from the abdominal cavity?
Diaphragm
Intercostal muscles
Sternocleidomastoid
Pectoralis major
#4
Which lung has three lobes?
Right lung
Left lung
Both lungs
None of the above
#5
Which of the following is NOT a part of the mediastinum?
Heart
Trachea
Lungs
Esophagus
#6
What is the function of the intercostal muscles?
To facilitate gas exchange
To elevate the ribs during inspiration
To protect the heart
To produce mucus
#7
What is the function of the pleural cavity?
To facilitate gas exchange
To protect the heart
To reduce friction during breathing
To produce mucus
#8
Which nerve innervates the diaphragm?
Phrenic nerve
Vagus nerve
Intercostal nerve
Sciatic nerve
#9
What is the name of the structure that covers the apex of each lung?
Pleural cavity
Costal surface
Cupula
Hilum
#10
Which of the following is NOT a function of the respiratory system?
Gas exchange
Regulation of blood pH
Production of hormones
Voice production
#11
Which of the following is a function of the visceral pleura?
To attach the lung to the thoracic wall
To facilitate gas exchange
To reduce friction during breathing
To produce mucus
#12
Which structure separates the superior and inferior mediastinum?
Diaphragm
Sternum
Manubrium
Transverse thoracic plane
#13
What is the function of the costal surface of the lung?
To attach the lung to the thoracic wall
To facilitate gas exchange
To protect the lung from injury
To reduce friction during breathing
#14
What is the significance of the parietal pleura?
It produces surfactant
It covers the surface of the lungs
It lines the thoracic cavity
It facilitates gas exchange
#15
What is the name of the space between the two pleural layers?
Pleural cavity
Mediastinum
Pleural fissure
Pleural recess
#16
What is the function of the pleural fluid?
To provide nutrients to the lung tissue
To reduce surface tension and facilitate lung expansion
To prevent air from entering the pleural cavity
To assist in gas exchange
#17
What is the function of the mediastinal pleura?
To protect the heart and great vessels
To facilitate gas exchange
To reduce friction during breathing
To produce mucus