Question

 The relationship between volume and pressure means.....

 As volume increases pressure increases and causes air to be expelled from the lungs.

 As volume increases pressure decreases and causes air to be expelled from the lungs.

 As volume increases pressure increases and causes to be inhaled into the lungs.

 As volume increases pressure decreases and causes air to be inhaled in to the lungs.

 How does air enter the lungs when we inhale?

 We suck air in by contracting muscles in our throat and this causes air to flow down into our lungs pushing out the old air.

 We breathe out air creating a vacuum in our lungs. Air flows in to remove the vacuum and replenishes the air.

 When we breathe in we actually expand our thoracic cavity by contracting the intercostal and diaphragm muscles. Because the lungs are connected to the thoracic wall yia the pleural fluid the lungs also expand decreasing pressure and air flows in.

 None of these are true.

Answer 1

Answer 1The relationship between volume and pressure means as volume increases pressure decreases and causes air to be inhaled in to lungs.

Answer 2 as air enters the lungs when we inhale

When we breathe in we actually expands our thoracic cavity by contracting the intercoastal and diaphragm muscles. Because lungs are connected to the thoracic wall