Alberta Biology 20 Respiratory and Circulatory System

What is the primary function of the respiratory system?

• To transport nutrients to cells

• To exchange gases between the body and the environment

• To pump blood throughout the body

• To produce hormones

Which structure in the respiratory system is responsible for the voice production?

• Trachea

• Larynx

• Bronchi

• Alveoli

What is the main function of alveoli in the lungs?

• To filter out dust and pathogens

• To humidify and warm the air

• To facilitate gas exchange

• To transport oxygen to tissues

Which part of the heart receives deoxygenated blood from the body?

• Left atrium

• Right atrium

• Left ventricle

• Right ventricle

What is the role of haemoglobin in the blood?

• To transport carbon dioxide

• To transport oxygen

• To fight infections

• To clot blood

Which blood vessel carries oxygenated blood from the lungs to the heart?

• Pulmonary artery

• Pulmonary vein

• Aorta

• Vena cava

What is the primary function of the circulatory system?

• To produce red blood cells

• To transport nutrients, gases, and wastes

• To regulate body temperature

• To protect against pathogens

Which of the following is a component of the first line of defence in the immune system?

• Antibodies

• Skin

• T-cells

• B-cells

What is the effect of exercise on the heart?

• Decreases heart rate

• Increases heart rate

• Decreases blood pressure

• Increases blood viscosity

Which structure prevents the backflow of blood in the heart?

• Valves

• Arteries

• Veins

• Capillaries