Which of the labeled steps in the diagram involve contraction of the abdominal muscles?
A)A
B)B
C)C
D)D
E)The abdominal muscles are not involved in any of the labeled respiratory events.

Question

Which of the labeled steps in the diagram involve contraction of the abdominal muscles? 
A)A 
B)B 
C)C 
D)D 
E)The abdominal muscles are not involved in any of the labeled respiratory events.

Quizplus · Accepted Answer

The Answer of Which of the labeled steps in the diagram involve contraction of the abdominal muscles? 
A)A 
B)B 
C)C 
D)D 
E)The abdominal muscles are not involved in any of the labeled respiratory events.

Which of the Labeled Steps in the Diagram Involve Contraction