What system controls the automatic process of breathing?

• Endocrine system

• Muscular system

• Autonomic nervous system

• Circulatory system

What happens when the diaphragm flattens?

• The heart rate increases

• The bronchioles constrict

• The lungs contract

• The chest cavity enlarges

How would you describe the lungs?

• Hollow organs that are able to hold the air you breathe.

• Muscular organs that contract and relax to take air in and out.

• Spongy organs made up of small tubes that transport air.

• Organs containing enzymes to convert oxygen into carbon diaxide

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

• To filter air

• To carry oxygen

• To transport nutrients

• To produce carbon dioxide

Where does the exchange of oxygen and carbon dioxide occur?

• In the nostrils

• In the alveoli

• In the bronchi

• In the trachea

The trachea (windpipe) branches into tubes called ___ that enter into each lung.

• bronchioles

• bronchi

• alveoli

• epiglottis

What process is involved in the exchange of gasses in the lungs?

• Cellular Respiration

• Diffusion

• Photosynthesis

• Osmosis

How much air do the lungs process daily?

• About 15,000 liters

• About 10,000 liters

• About 20,000 liters

• About 5,000 liters