Asked by Lorenzo Francis on Jul 22, 2024
Verified
Which of these occurs when air leaves the lungs?
A) The diaphragm relaxes.
B) Thoracic pressure decreases.
C) The diaphragm flattens, enlarging the thoracic cavity.
D) The intercostal muscles raise the ribs.
E) Air pressure in the lungs becomes lower than atmospheric pressure.
Thoracic Pressure
The pressure within the thoracic cavity, affecting the lungs and heart, essential for respiration and cardiovascular functions.
Diaphragm
A dome-shaped, muscular partition separating the thorax from the abdomen in mammals, playing a major role in breathing as its contraction increases the volume of the thorax and so inflates the lungs.
Intercostal Muscles
Muscles located between the ribs that play a role in the mechanics of breathing.
- Identify the functions and mechanisms of breathing and airway protection.
Verified Answer
AM
Aurora MarquezJul 25, 2024
Final Answer :
A
Explanation :
When air leaves the lungs, the diaphragm relaxes. This relaxation moves the diaphragm upwards, decreasing the volume of the thoracic cavity and increasing the pressure inside the lungs, which helps to expel air.
Learning Objectives
- Identify the functions and mechanisms of breathing and airway protection.