1. Which of the following is NOT a function of the respiratory system?
a) Exchange of gases
b) Regulation of blood pH
c) Production of hormones
d) Defense against pathogens
2. What is the main organ of the respiratory system responsible for gas exchange?
a) Lungs
b) Trachea
c) Bronchi
d) Diaphragm
3. Which blood vessels carry oxygenated blood away from the heart?
a) Arteries
b) Veins
c) Capillaries
d) Venules
4. The structure that separates the left and right sides of the heart is called the:
a) Atrium
b) Ventricle
c) Septum
d) Valve
5. What is the role of hemoglobin in the blood?
a) Transporting oxygen
b) Transporting carbon dioxide
c) Regulating blood pressure
d) Fighting infections
6. Which of the following is NOT a component of the cardiovascular system?
a) Heart
b) Lungs
c) Blood vessels
d) Blood
7. The process of breathing in is called:
a) Exhalation
b) Inhalation
c) Respiration
d) Ventilation