What is the primary function of breathing?

• To transport oxygen to cells and remove carbon dioxide

• To circulate blood

• To control body temperature

• To digest food

Which system controls the involuntary action of breathing?

• Autonomic nervous system

• Endocrine system

• Digestive system

• Circulatory system

What happens to the diaphragm when you inhale?

• It relaxes and moves downwards

• It contracts and moves upwards

• It contracts and flattens

• It relaxes and bulges out

What are the tiny air sacs in the lungs called?

• Bronchioles

• Capillaries

• Alveoli

• Bronchi

What is the main role of hemoglobin in the respiratory process?

• To carry nutrients

• To transport oxygen

• To produce oxygen

• To transport carbon dioxide

Through what process do oxygen and carbon dioxide exchange places in the lungs?

• Diffusion

• Filtration

• Osmosis

• Active transport

What triggers the exhalation process?

• Inhalation of oxygen

• The autonomic nervous system

• Expansion of the alveoli

• Contraction of the heart

What happens to the diaphragm during exhalation?

• It relaxes and moves upwards

• It contracts and flattens

• It relaxes and bulges out

• It contracts and moves upwards

How often do the lungs inhale and exhale per minute?

• 5 to 10 times

• 15 to 25 times

• 30 to 40 times

• 50 to 60 times

Approximately how much air do the lungs process daily?

• 10,000 liters

• 5,000 liters

• 15,000 liters

• 20,000 liters