Quiz on Circulatory and Pulmonary Systems

What is the primary function of breathing?

• To regulate body temperature

• To filter air

• To take in oxygen and expel carbon dioxide

• To take in carbon dioxide

What are the tubes called that carry air to the lungs?

• Veins

• Alveoli

• Bronchi

• Capillaries

What are the tiny air sacs in the lungs called?

• Arteries

• Alveoli

• Bronchioles

• Veins

What is the role of hemoglobin in the blood?

• To fight infections

• To regulate blood pressure

• To transport oxygen

• To transport carbon dioxide

What is the name of the muscle that helps in breathing?

• Diaphragm

• Pectoral muscles

• Abdominal muscles

• Intercostal muscles

How does oxygen enter the bloodstream?

• Through the bronchi

• Through the trachea

• Through the larynx

• Through the alveoli

What happens to carbon dioxide in the lungs?

• It is stored in the alveoli

• It is absorbed into the blood

• It is exhaled

• It is converted to oxygen

What is the function of the trachea?

• To filter blood

• To transport air to the lungs

• To absorb nutrients

• To produce sound

What is the term for blood vessels that carry blood away from the heart?

• Arteries

• Alveoli

• Veins

• Capillaries

What is the average diameter of an alveolus?

• 200-300 microns

• 1-2 millimeters

• 5-10 microns

• 1-2 microns