Question

Which of the following sequences is correct to initiate inspiration?

I. The contraction of external intercostal muscles raises the ribs and sternum

II. Volume of thorax increases in he dorso-ventral axis

III. Intrapulmonary pressure decreases

IV. Diaphragm contraction

V. Air rushes into lungs

VI. Volume of thorax increases in the anterior-posterior axis

• A. I, II, IV, V, III, VI
• B. I, II, III, IV, V
• C. I, II, IV, VI, III, V
• D. VI, V, I, II, III, IV

Answer 1

Answer: (C)

I, II, IV, VI, III, V