A.1.3 Transport (Gas Exchange)

Which chamber of the heart is responsible for pumping deoxygenated blood into the pulmonary artery?

• Left Ventricle

• Left Atrium

• Right Ventricle

• Right Atrium

What is the name of the circulatory system that facilitates gas exchange between the heart and the lungs?

• Systemic circulation

• Coronary circulation

• Pulmonary circulation

• Hepatic portal circulation

What is the approximate partial pressure of oxygen (P O2) in the atmosphere at sea level?

• 590 mmHg

• 760 mmHg

• 0.3 mmHg

• 159 mmHg

What is the approximate partial pressure of oxygen (P O2) in the alveoli after inhaled air reaches them?

• 159 mmHg

• 104 mmHg

• 40 mmHg

• 760 mmHg

What is the partial pressure of carbon dioxide (PCO2) in the pulmonary artery and the alveoli, respectively?

• 40 mmHg and 45 mmHg

• 45 mmHg and 40 mmHg

• 104 mmHg and 40 mmHg

• 100 mmHg and 45 mmHg

How much more soluble is carbon dioxide compared to oxygen across the respiratory membrane?

• 5 times

• 10 times

• 20 times

• 50 times

What is the typical cardiac output (amount of blood pumped per minute) for both the right and left ventricles?

• 2 L/min

• 4 L/min

• 6 L/min

• 8 L/min

What is the approximate total surface area available for gas exchange in the lungs?

• 10 square meters

• 30 square meters

• 70 square meters

• 100 square meters