How Do Lungs Work?

What waste product is removed by the respiratory system?

• lactic acid

• insoluble fiber

• nitrogenous waste

• carbon dioxide

What system controls the involuntary action of breathing?

• Autonomic nervous system

• Cardiovascular system

• Endocrine system

• Muscular system

What happens when the diaphragm flattens?

• The lungs contract

• The chest cavity becomes smaller

• The lungs expand

• The heart rate decreases

What is the primary function of hemoglobin in the respiratory process?

• To carry oxygen

• To pump blood

• To filter air

• To produce carbon dioxide

What drives this diffusion of carbon dioxide and oxygen?

• mitochondria

• a concentration gradient

• ion transport

• facilitated diffusion

What triggers the release of carbon dioxide from the lungs?

• Inhalation of oxygen

• Relaxation of the intercostal muscles

• Expansion of the bronchioles

• Contraction of the diaphragm

What is the average respiratory rate?

• 72-75 bpm

• 15-25 bpm

• 2-5 bpm

• 170-185 bpm

Approximately how many liters of air do the lungs process daily?

• 20,000 liters

• 15,000 liters

• 10,000 liters

• 5,000 liters