Breathing and Respiration Quiz

Which of the following best differentiates breathing from respiration?

• Both involve gas exchange only

• Breathing produces energy, respiration does not

• Breathing is physical, respiration is chemical

• Respiration happens in lungs, breathing happens in cells

The main function of oxygen in cellular respiration is to:

• Break down glucose

• Form carbon dioxide

• Help digest food

• Act as the final electron acceptor to release energy

Why does your breathing rate increase after exercise?

• To cool down the body

• To remove excess glucose

• To supply more oxygen and remove more CO₂

• To increase digestion

Which of the following is NOT part of the human respiratory system?

• Trachea

• Diaphragm

• Alveoli

• Kidney

What is the role of alveoli in the lungs?

• Pump air

• Exchange gases

• Filter blood

• Digest food

In which form is energy stored in our body after respiration?

• Glucose

• Protein

• ATP

• Lactic acid

Anaerobic respiration in human muscles produces:

• Water and oxygen

• Alcohol and CO₂

• Lactic acid and energy

• Carbon monoxide

Which part of the brain controls breathing?

• Cerebrum

• Cerebellum

• Medulla oblongata

• Pituitary gland

Which of these changes is observed during inhalation?

• Diaphragm relaxes and moves up

• Ribs move inward

• Lungs shrink

• Chest cavity expands

What happens when the diaphragm contracts?

• We exhale air

• The chest cavity shrinks

• Air rushes out of the lungs

• The lungs fill with air