respiratory system

Question 1

15. When the diaphragm contracts, volume inside the lungs____ and pressure inside the lungs ____.

Answer 1

increases; decreases

Question 2

16. In the alveoli, CO2 moves ____ the blood and O2 moves _____ the blood.

Answer 2

out of; into

Question 3

18. Under normal conditions when the diaphragm contracts, air pressure in the chest _____.

Answer 3

decreases

Question 4

19. During gas exchange, which substance moves from the alveoli into the blood?

Answer 4

oxygen

Question 5

20. Which structure leads to the alveolar sac?

Answer 5

pulmonary venuole.

Question 6

37. The flap of elastic cartilage that protects from from entering the larynx when swallowing is called the _______.

Answer 6

epiglottis