ACTIVITY 3

Question 1

4 / 4 pts

When the diaphragm and         [ Select ]      ["The internal intercostal muscles", "The abdominal muscles", "The external intercostal muscles"]  muscles contract, the volume of the lungs         [ Select ]      ["increases", "decreases"]  . As a result, the alveolar pressure         [ Select ]      ["decreases", "increases"]  . Air rushes in because the atmospheric pressure is now         [ Select ]      ["less", "greater"]  than the alveolar pressure.

Answer 1:

The external intercostal muscles

 

Answer 2:

increases

 

Answer 3:

decreases

 

Answer 4:

greater

 

 

UnansweredQuestion 2

Question 2

4 / 4 pts

When the         [ Select ]      ["The diaphragm", "The internal intercostal muscles", "The abdominal muscles"]  and the external intercostal muscles relax, the volume of the lungs         [ Select ]      ["increases", "decreases"]  . This results in a         [ Select ]      ["increase", "decrease"]  in alveolar pressure. Air flows out of the body because the atmospheric pressure is now         [ Select ]      ["less", "more"]  than the alveolar pressure.

Answer 1:

The diaphragm

 

Answer 2:

decreases

 

Answer 3:

increase

 

Answer 4:

less