Transport in Animals Quiz

Which of the following best describes the main function of the circulatory system in mammals?

• To produce hormones for growth

• To transport oxygen, nutrients, and waste products around the body

• To control body temperature only

• To digest food

What is the name of the blood vessel that carries oxygenated blood from the lungs to the heart?

• Pulmonary artery

• Pulmonary vein

• Aorta

• Vena cava

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

• Left atrium

• Right atrium

• Left ventricle

• Right ventricle

What is the primary role of haemoglobin in red blood cells?

• To digest pathogens

• To transport oxygen

• To produce antibodies

• To clot blood

Which of the following best describes the structure of haemoglobin?

• A single polypeptide chain with no prosthetic group

• Four polypeptide chains, each with a haem group

• Two polypeptide chains with no haem group

• Four carbohydrate chains

During which phase of the cardiac cycle does the heart muscle contract to pump blood out of the chambers?

• Diastole

• Systole

• Resting phase

• Repolarisation

Which blood vessel has the thickest muscular wall?

• Vein

• Artery

• Capillary

• Venule

What is the function of valves in the heart?

• To increase blood pressure

• To prevent backflow of blood

• To produce red blood cells

• To absorb nutrients

Which of the following equations represents the reaction of haemoglobin with oxygen?

Which side of the heart pumps blood to the lungs?

• Left

• Right

• Both

• Neither