Circulatory System - Practice Quiz

What is the primary function of blood in the human body?

• To maintain a certain pH, temperature, and osmotic pressure

• To provide structural support to the body

• To facilitate muscle contraction

• To generate electrical impulses for the brain

What does human blood transport around the body?

• Only oxygen

• Only nutrients

• Hormones, nutrients, and gases

• Only water

What color is human blood?

• Purple

• Red

• Transparent

• Blue

Which of the following are components of blood?​ ​ ​ ​ ​ (a)   ​ (b)   ​ (c)   ​ (d)   ​

• plasma
• red blood cells
• white blood cells
• platelets
• micropolymers
• nephrons
• nerve cells
• alveoli
• capillaries

What is the role of red blood cells?

• To transport gases

• To clot blood

• To carry nutrients

• To fight infections

What do arteries generally carry?

• Blood away from the heart

• Blood to the heart

• Only oxygen-poor blood

• Only nutrients

What do veins generally carry?

• Blood away from the heart

• Blood to the heart

• Only oxygen-poor blood

• Only nutrients

Where does the exchange of oxygen and carbon dioxide take place?

• In the arteries

• In the veins

• In the heart

• In the capillaries

What is the significance of the heart's valves?

• To produce red blood cells

• To prevent backflow of blood

• To oxygenate blood

• To pump blood

Which component of blood is primarily responsible for clotting?

• Red blood cells

• White blood cells

• Platelets

• Plasma