Respiratory System Functions Quiz

What is the significance of respiratory volumes in athletes?

• They determine the athlete's speed

• They indicate lung capacity and endurance

• They measure muscle strength

• They assess flexibility

How does oxygen move from the lungs to the blood?

• By osmosis

• By diffusion

• By active transport

• By filtration

What is the process called where oxygen moves from the alveoli into the blood?

• Respiration

• Diffusion

• Circulation

• Inhalation

In which part of the respiratory system does the exchange of oxygen and carbon dioxide primarily occur?

• Bronchi

• Alveoli

• Trachea

• Larynx

During inhalation, what happens to the thoracic cavity volume?

• It decreases

• It remains the same

• It increases

• It fluctuates

What happens to the diaphragm during expiration?

• It contracts

• It relaxes

• It expands

• It remains still

What happens to the diaphragm during inhalation?

• It contracts and flattens.

• It expands and curves.

• It remains unchanged.

• It contracts and curves.

Which of the following is NOT a result of diaphragm relaxation during exhalation?

• Decreased thoracic cavity volume.

• Increased lung pressure.

• Air is drawn into the lungs.

• Air is expelled from the lungs.

During exhalation, what happens to the volume of the thoracic cavity?

• It increases.

• It decreases.

• It remains unchanged.

• It fluctuates.

What is the effect of the external intercostals contracting during inhalation?

• Decreases lung capacity

• Increases lung capacity

• Stabilizes the rib cage

• Compresses the diaphragm