Expiration

Q. During expiration the volume of the chest cavity __________ and the intrapulmonary pressure __________.

1. increases, increases
2. decreases, increases
3. increases, decreases
4. decreases, decreases

Q. During expiration the diaphragm___________________ and the volume of the thoracic cavity____________________ .

1. relaxes, increases
2. contracts, decreases
3. relaxes, decreases
4. contracts, increases