Question

Name R2 Pressure Changes and Air Flow Using the terms provided, complete these statements: Decreases Higher Increases Lower Pressure Volume The flow of air into and out of the lungs is govered by two physical principles: 1. Changes in volume result in changes in pressure. As the volume of a container increases, the pressure within the container (1), and as the volume of a container decreases, the pressure within the container (2) 2. Air flows from areas of (3) pressure to areas of (4) pressure. The muscles of respiration cause changes in thoracic (5), and changes in thoracic volume cause changes in (6) that result in air flow. 1. Pressure UAWN Using the terms provided, complete these statements: Alveolar pressure Atmospheric pressure Equal to Less than Out of Greater than Into The air pressure within alveoli is called (1), and the air pressure outside the body is called (2). At the end of expiration, alveolar pressure is (3) atmospheric pressure and there is no movement of air into or out of the lungs. During inspiration, alveolar volume increases, causing alveolar pressure to become (4) atmospheric pressure. Because of this pressure difference, air moves (5) the lungs. At the end of inspiration, alveolar pressure is (6y atmospheric pressure and there is no movement of air into or out of ADM IN hecame Page 1 of 2 362 words Focus 8 + 115%

Answer 1

R2

1.Changes in volume result in change in pressure.As the volume of a container increases the pressure within the container decreases ,and as the volume of a container decreases,the pressure with the container increases.

2.Air flows from area of higher pressure to area of lower pressure.

6.The air pressure within the alveoli is called alveolar pressure and the air pressure outside the body is called atmospheric pressure.At the end of expiration,alveolar pressure is equal the atmospheric pressure and there is no movement of air into or out of lung.During inspiration,alveolar volume increases,causing alveolar pressure to become less than atmospheric pressure.Beacause of this pressure difference air move into the lung.At the end of the inspiration alveolar pressure is equal atmospheric presssure and there is no movement of air into or out of the lung.During expiration,alveolar volume decreases,causing alveolar pressure to become greater than atmospheric pressure .Because of this pressure difference air moves out of the lung.