MIdterm

What is the function of the diaphragm during breathing?

• It contracts to push air out of the lungs.

• It relaxes to increase the chest cavity size.

• It contracts to separate the abdominal cavity.

• It expands to pull the ribcage downwards.

Which process describes taking air into the lungs?

• Expiration

• Respiration

• Inspiration

• Ventilation

What role do the alveoli play in the respiratory system?

• They filter dust and particles from the air.

• They produce mucus to trap dust.

• They facilitate gas exchange in the lungs.

• They move air from the trachea to the bronchi.

How does oxygen move from the alveoli into the blood?

• By active transport through the alveolar walls.

• By diffusion through the cell walls and capillaries.

• By osmosis through the alveolar lining.

• By filtration through the capillary walls.

What is the primary function of the cilia in the trachea?

• To produce mucus.

• To trap dust and particles.

• To move air into the bronchi.

• To absorb oxygen into the blood.

What is released during aerobic respiration when glucose reacts with oxygen?

• Carbon dioxide and water

• Lactic acid and energy

• Tar and nicotine

• Carbon monoxide and tar

Which type of respiration involves glucose being only partially broken down?

• Aerobic respiration

• Anaerobic respiration

• Photosynthesis

• Fermentation

What is the main addictive chemical found in tobacco plants?

• Tar

• Carbon monoxide

• Nicotine

• Carcinogens

What harmful effect does tar have on the respiratory system?

• It increases oxygen levels

• It paralyzes cilia in cells

• It reduces dopamine release

• It enhances lung function

What is the effect of nicotine on the brain?

• It decreases energy levels

• It triggers the release of dopamine

• It causes paralysis of cilia

• It binds to hemoglobin