Cardiovascular System Quiz pt 2

Veins carry blood towards the heart. What valves are present in veins to prevent backflow of blood?

• Semilunar valves

• Atrioventricular valves

• Heart valves

• Aortic valve

Blood is a fluid connective tissue that transports various substances throughout the body. What are the two main components of blood?

• Plasma and lymph

• Plasma and red blood cells

• White blood cells and platelets

• Red blood cells and plasma proteins

Hemoglobin is a protein molecule found inside red blood cells that binds to and transports what molecule?

• Carbon dioxide

• Glucose

• Oxygen

• Water

Red blood cells are also known as what?

• Leukocytes

• Erythrocytes

• Thrombocytes

• Lymphocytes

White blood cells are part of the body’s immune system and help defend against what?

• Dehydration

• Blood loss

• Infection

• Low blood sugar

Exchange of gases and nutrients between blood and tissue cells occurs mainly in which part of the circulatory system?

• Arteries

• Veins

• Capillaries

• Lymphatic vessels

What is the main function of red blood cells?

• To fight infection

• To clot blood

• To carry oxygen

• To transport nutrients

The cardiovascular system works together with the respiratory system to provide what gas to the body’s cells?

• Nitrogen

• Oxygen

• Carbon dioxide

• Helium

When the body is exercising, which organ system works together with the cardiovascular system to deliver increased oxygen to the muscles?

• Respiratory system

• Nervous system

• Digestive system

• Endocrine system

What is the waste product produced by cellular respiration that is transported by the blood from the body’s cells to the lungs?

• Oxygen

• Carbon dioxide

• Nitrogen

• Water vapor