The blood

Which of the following statements is true concerning human blood?

• The blood contains four major components.

• Some human populations normally lack the ability to produce plasma.

• Proteins are not normal components of human blood.

• The platelets give the blood its color.

1. Erythrocyte is another name for a:

• red cell

• white cell

• platelet

• plasma

1. Which of the following blood components provide the major defense for our bodies against invading bacteria and viruses?

• Red blood cell

• White Blood cell

• Plasma

• Platelets

The relatively clear liquid medium which carries the other cells of blood is called:

• lipid

• antibody

• plasma

• water

1. Which of the following are likely to increase in quantities when the body is under attack from bacteria?

• erythrocytes

• leukocytes

• thrombocytes

• water