MEDICAL
LUNGS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
What happens when the intercostals contract during inhalation?
|
|
The diaphragm relaxes
|
|
|
The ribs are elevated
|
|
|
Pressure in the lungs increases
|
|
|
The size of the thoracic cavity decreases
|
Explanation:
Detailed explanation-1: -At the same time, the muscles between the ribs contract and pull upward. This increases the size of the thoracic cavity and decreases the pressure inside. As a result, air rushes in and fills the lungs.
Detailed explanation-2: -The Respiratory System One, the diaphragm, lies at the base of the rib cage. Another, the external intercostals, lifts and expands the rib cage. The major muscle group for exhalation is made up of the internal intercostals. These muscles pull down on the rib cage and thereby push air out of the lungs.
There is 1 question to complete.