Question

Pressure gradient between the lungs and atmosphere is generated by
a-diaphragm, b-external intercostal muscles, internal intercostal muscles, d-ribs

• A. $a$ and $b$
• B. $a$ and $c$
• C. $a, b$ and $c$
• D. $a, b, c$ and $d$

Answer 1

Answer: (D)

The diaphragm and a specialised set of muscles external and internal intercostals between the ribs, help ,in generation of pressure gradients.