30 Questions
What is the primary function of the rectus abdominis muscles during expiration?
To push the lower ribs downward and compress the abdominal content towards the diaphragm
What is the characteristic of the lung structure that allows it to move freely within the thoracic cavity?
Its elasticity and the presence of pleural fluid
What is the purpose of the negative pressure between the visceral surface of the lung and the parietal surface of the thoracic cavity?
To aspirate excess fluid into the lymphatic duct
What is the role of the intercostal internal muscles during expiration?
To contract and pull the ribs downward
What is the term for the pressure of the fluid between the pulmonary pleura and the parietal pleura of the thoracic cavity?
Intrapleural pressure
What happens to the ribs during expiration?
They move downward and inward
What is the total volume of air that passes through the respiratory system in one minute?
6000ml
What is the function of alveoli in the respiratory system?
To exchange gases with the bloodstream
What is the percentage of the tidal volume that reaches the alveoli?
33%
What is the term for the volume of air that is not involved in gas exchange?
Dead space
What is the total lung capacity of a healthy individual?
5800ml
What is the normal respiratory rate in a healthy adult?
12 breaths/min
What is the main function of the pulmonary circulation?
To ensure the oxygenation of blood through hematosis
What is the difference between the physiological dead space and the anatomical dead space?
The physiological dead space includes alveoli that are not functioning or functioning partially, while the anatomical dead space does not
In a person with non-functional or partially functional alveoli, what happens to the physiological dead space compared to the anatomical dead space?
The physiological dead space increases up to 10 times
What is the main difference between the pulmonary circulation and the systemic circulation?
The pulmonary circulation pumps blood to the lungs, while the systemic circulation pumps blood to the rest of the body
What is the starting point of the pulmonary circulation?
The right atrium
What is the term for the process of oxygenating blood in the lungs?
Hematosis
What is the main function of the trachea?
To provide an open pathway for inhaled and exhaled air
What is the main difference between the right and left lungs?
The right lung is shorter and wider than the left lung
What is the purpose of the pleura?
To provide a barrier between the lungs and the chest cavity
What is the number of cartilaginous rings in the trachea?
20
What is the main function of the bronchi?
To provide a pathway for air to enter the lungs
What is the name of the structure that separates the right lung into three lobes?
Oblique and horizontal fissures
What is the primary function of the arteria pulmonar?
Carry deoxygenated blood from the heart to the lungs
What is the site of gas exchange in the lungs?
Vasos sanguíneos más pequeños
What is the name of the valve that separates the ventrículo derecho from the arteria pulmonar?
Válvula semilunar
What is the function of the hemoglobina in the glóbulos rojos?
Transport oxygen from the lungs to the body
What is the name of the circulation that occurs between the heart and the lungs?
Circulación pulmonar
What is the result of the intercambio gaseoso in the lungs?
Oxygenated blood is pumped to the body
This quiz is about the muscles involved in expiration, specifically the muscles that pull the rib cage down during exhalation. It also discusses the action of these muscles on the abdominal contents and the diaphragm.
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