Circulatory System Quiz

What is the primary function of arteries?

• Transport deoxygenated blood

• Transport carbon dioxide to lungs

• Transport oxygenated blood at high pressures

• Transport nutrients to tissues

Which layer is the thickest in arteries?

• Endothelium

• Tunica externa

• Tunica media

• Tunica intima

What is the main characteristic of capillary walls?

• Made of smooth muscle

• Contains valves

• One cell thick

• Thick and muscular

What is the role of the lymphatic system?

• Transport oxygen

• Drainage system and immunity

• Pump blood

• Regulate blood pressure

What is the primary function of red blood cells?

• Transport carbon dioxide

• Transport nutrients

• Transport oxygen

• Fight infections

What separates the right and left sides of the heart?

• Septum

• Ventricles

• Atria

• Valves

What occurs during ventricular systole?

• Atria contract

• Ventricles relax

• Ventricles contract

• Blood flows into atria

What is the Bohr effect?

• Decrease in blood volume

• Increase in blood pressure

• Decrease in oxygen affinity due to high CO2

• Increase in oxygen affinity due to low CO2

How is carbon dioxide primarily transported in the blood?

• Bound to glucose

• Dissolved in plasma

• As bicarbonate ions

• As oxygen

What is the function of the sinoatrial node (SAN)?

• Contracts ventricles

• Acts as a pacemaker

• Pumps blood

• Prevents backflow