Respiratory System Level 2

Which of the following correctly describes the process of diffusion in the lungs?

• a) Diffusion is the movement of molecules from an area of greater concentration to an area 
of lesser concentration

• b) Diffusion is the movement of molecules from an area of lesser concentration to an area of higher concentration

• c) Diffusion involves the movement of oxygen into the capillaries to be expelled by the lungs

• d) Diffusion involves the movement of carbon dioxide into the capillaries to be used by the body

Which of the following gases diffuse into the alveoli to be expelled by the lungs?

• a) Hydrogen

• b) Carbon monoxide

• c) Oxygen

• d) Carbon dioxide

Which of the following describes the bronchi?

• a) They are extensions from the trachea that carry air into the lungs

• b) They are the small air sacs where gaseous exchange takes place

• c) They are extensions from the bronchioles that carry air into the lungs

• d) They are the small air sacs at the end of the bronchioles

Which of the following describes the function of the aorta?

• a) It carries oxygenated blood to the heart

• b) It carries deoxygenated blood to the heart

• c) It carries deoxygenated blood to the lungs

• d) It carries oxygenated blood to the body

Which of the following statements about the Respiratory System is true?

• a) The respiratory system is involved in supplying oxygen to the blood and removing carbon dioxide.

• b) The respiratory system is responsible for pumping blood throughout the body

• c) The respiratory system is involved in sending signals through the spinal column

• d) The respiratory system can help with digestion

What is the percentage of Nitrogen found in Exhaled Air?

• a) 16%

• b) 77%

• c) 78%

• d) 4%

What is the percentage of Carbon dioxide in the Normal Air?

• a) 40%

• b) 4%

• c) 0.04%

• d) 44%

Which of the following statements is true?

• a) When the Diaphragm contracts, it flattens and increases the abdominal cavity

• b) When the Diaphragm contracts, it raises and reduces the abdominal cavity

• c) When the Diaphragm contracts, it helps increasing the amount of blood pumped throughout the body

• d) When the Diaphragm contracts, it pulls the ribs upwards and outwards