Transport in Animals and Circulatory System Quiz

What is the function of arteries in the circulatory system?

• Carrying blood at high pressure away from the heart

• Returning blood back to the heart at low pressure

• Diffusing oxygen into the cells

• Draining excess fluid into the lymphatic system

Which structure separates oxygenated and deoxygenated blood in the heart?

• Atrioventricular valves

• SA node

• Intercalated discs

• Septum

What is the main function of the SA node in the heart?

• Carrying oxygen-rich blood to the heart tissue

• Preventing backflow of blood into the atria

• Contracting to squeeze blood into the ventricles

• Initiating the heartbeat

Which type of transport mechanism is responsible for moving glucose into the cells?

• Active transport

• Facilitated diffusion

• Osmosis

• Passive diffusion

Why do fish not require a double circulatory loop like mammals?

• Because fish have a larger heart compared to mammals

• Because fish have water outside their gills creating enough pressure

• Because fish have lungs similar to mammals

• Because fish have a higher pressure in their circulatory system

What is the function of the AV node in the heart?

• Carrying oxygen-rich blood to the heart tissue

• Preventing backflow of blood into the atria

• Contracting to squeeze blood into the ventricles

• Initiating the heartbeat

Which vessels branch off from the aorta to carry oxygen-rich blood to the heart tissue?

• Vena cava

• Pulmonary veins

• Coronary arteries

• Pulmonary arteries

What is the main function of the semi-lunar valves in the heart?

• Contracting to squeeze blood into the ventricles

• Preventing backflow of blood into the atria

• Preventing backflow of blood into the ventricles

• Initiating the heartbeat

Which part of the heart has thicker muscular walls, the atria or the ventricles?

• Atria

• Both have equal thickness

• Ventricles

• None of the above

What is the main function of the AV valves in the heart?

• Contracting to squeeze blood into the ventricles

• Preventing backflow of blood into the ventricles

• Initiating the heartbeat

• Preventing backflow of blood into the atria