18 Questions
What is the function of the pleural cavity?
To prevent friction between the lung layers during breathing
Which lung has more lobes and segments?
Right lung
What is the shape of the base of the lung?
Concave & semilunar
Which lung does not have a middle lobe?
Left lung
Which fissure separates the upper and lower lobes in the right lung?
Oblique fissure
What does the mediastinal surface of the left lung have?
Large cardiac impression
What is the average respiratory rate per minute?
14 breaths
During expiration, what happens to the capacity of the thoracic cavity?
It decreases
What is the function of the diaphragm during inspiration?
It contracts and moves downward
Which muscle contracts to enlarge the thoracic cavity during breathing cycles?
Diaphragm
What is the approximate volume of tidal volume (TV) during each breathing cycle?
500 ml
In gas exchange, where does oxygen primarily pass through to reach the blood?
Alveoli walls and capillaries
Where does the exchange of gases in the lungs primarily take place?
Alveoli
What type of cells line the distal bronchioles?
Non-ciliated cuboidal-shaped cells
Which nerve is primarily responsible for the nerve supply related to external respiration?
Vagus nerve
What is the function of the pleura in relation to the lungs?
To create a closed sac that contains serous fluid around each lung
Which of the following is true about the visceral pleura?
Adheres to the lung, covering each lobe & passing into the fissures
What is the main function of conducting airways in the respiratory system?
Bring air into the lungs
Test your knowledge on the respiratory system and breathing cycles. Learn about lung volumes, capacities, and the different phases of breathing including inspiration and expiration. Explore how the intercostal muscles and diaphragm contribute to the process.
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