Human Transport Systems

Which blood cells are specialized cells that carry oxygen to respiring cells?

• white blood cells

• platelets

• red blood cells

Which blood component is a straw-colored liquid which the other components of the blood are suspended within?

• red blood cells

• white blood cells

• plasma

What is the waste substance produced in the breakdown of proteins by the liver?

• carbon dioxide

• urea

• mineral ion

What is the waste product of respiration, dissolved in the plasma as hydrogen carbonate ions and transported from respiring cells to the lungs?

• sulfur dioxide

• carbon monoxide

• carbon dioxide

What is the shape of a red blood cell?

• round

• biconcave disc

• no fixed shape

What are the chemical messengers released into the blood from the endocrine organs (glands) and delivered to target tissues/organs of the body?

• nerves

• cells

• hormones

What is created in respiration (an exothermic reaction)?

• hormone

• heat energy

• urea

What is the importance of blood clotting?

• Blood clotting prevents continued / significant blood loss from wounds.

• Scab formation seals the wound with an insoluble patch that allows the entry of microorganisms that could cause infection.

• It does not remain in place until new skin has grown underneath it, sealing the skin again.

Which blood cells are part of the body’s immune system?

• red blood cells

• white blood cells

Which main type of white blood cells produces antibodies?

• lymphocytes

• phagocytes