2GENBIO2 - CIRCULATORY SYSTEM

Multiple Choice

Which of the following statements about open and closed circulatory systems is correct?

• Open systems have blood contained in vessels at all times.

• Closed systems allow fluid to bathe tissues directly in open spaces.

• Open systems allow fluid to bathe tissues directly in open spaces.

• Closed systems do not use the heart to pump blood.

Multiple Choice

Which of the following statements best describes the difference in heart structure between amphibians and birds/mammals?

• Amphibians have two atria and two ventricles; birds and mammals have a single ventricle.

• Amphibians have a single atrium and ventricle; birds and mammals have two atria and two ventricles.

• Amphibians have two atria and a single ventricle; birds and mammals have two atria and two ventricles.

• Both amphibians and birds/mammals have two atria and a single ventricle.

Multiple Select

Select all correct statements about the pulmonary circuit.

• It carries oxygen-rich blood from the heart to the lungs.

• It returns oxygenated blood to the heart via pulmonary veins.

• It carries O2-poor blood from the heart to the lungs.

• It supplies the heart muscle with oxygenated blood.

Multiple Choice

Which circuit is responsible for returning O2-poor blood to the heart by way of veins?

• Pulmonary circuit

• Systemic circuit

• Coronary circuit

• Digestive circuit

Open Ended

Explain how the pulmonary and systemic circuits work together to circulate blood throughout the body.

Multiple Choice

Which part of the heart is responsible for pumping blood?

• Atrium

• Septum

• Ventricle

• Valve

Multiple Choice

What is the main function of valves in the heart?

• To pump blood

• To separate the sides of the heart

• To keep the blood moving in the right direction

• To receive blood

Multiple Choice

Which blood vessel has the thickest walls?

• Vein

• Artery

• Capillary

• Venule

Multiple Choice

Which chamber of the heart pumps blood to the lungs via the pulmonary arteries?

• Right ventricle

• Left ventricle

• Right atrium

• Left atrium

Multiple Choice

What is the correct order of blood flow starting from the left atrium to the rest of the body?

• Left atrium → Left ventricle → Aorta → Body tissues

• Left atrium → Right ventricle → Aorta → Body tissues

• Left atrium → Pulmonary artery → Body tissues

• Left atrium → Right atrium → Aorta → Body tissues

Multiple Choice

Which veins are responsible for returning O2-poor blood to the right atrium of the heart?

• Superior and inferior vena cava

• Pulmonary veins

• Aorta

• Pulmonary arteries

Multiple Choice

The circulatory system of an insect is _____________

• having a closed system

• having a four-chambered heart

• having a circulating hemolymph

• having a movement of blood through four seperate circuits

Multiple Choice

In _______, blood flows through a single circuit.

• Fishes

• Amphibians

• Birds

• Mammals

Multiple Choice

Which of the following statements is true?

• Arteries carry blood away from the heart, and veins carry blood toward the heart.

• Arteries carry blood toward the heart, and veins carry blood away from the heart.

• All arteries carry O2-rich blood, and all veins carry O2-poor blood.

• Arteries carry O2-poorblood, and all veins carry O2-rich blood.