Quiz on the Respiratory System and Exercise

What is the primary site of gas exchange in the respiratory system?

• Alveoli

• Trachea

• Nasal cavity

• Bronchi

Which muscle primarily facilitates inspiration?

• Pectoral muscles

• Intercostal muscles

• Diaphragm

• Abdominal muscles

What happens to intrapulmonary pressure during inspiration?

• It fluctuates

• It remains the same

• It decreases

• It increases

During expiration, which of the following occurs?

• Diaphragm contracts

• Oxygen is absorbed

• Thoracic volume increases

• Diaphragm relaxes

What drives the process of gas exchange in the alveoli?

• Oxygen concentration

• Temperature differences

• Carbon dioxide concentration

• Partial pressure gradients

How is oxygen primarily transported in the blood?

• Dissolved in plasma

• In white blood cells

• Bound to hemoglobin

• As bicarbonate

What is the ventilatory threshold (VT)?

• The point of maximum heart rate

• The point of muscle fatigue

• The point of maximum oxygen consumption

• The point of rapid increase in ventilation

What happens to blood flow to the lungs during acute exercise?

• It remains the same

• It fluctuates

• It increases

• It decreases

What adaptation occurs in the respiratory system due to endurance training?

• Decreased tidal volume

• Increased respiratory muscle strength

• Decreased ventilation rate

• Increased lung size

At high altitude, what happens to the partial pressure of oxygen?

• It fluctuates

• It remains the same

• It decreases

• It increases