Page 70 - Reading Success B9

Reading Questions

Choose the best answer.

1. What is the name given to white blood cells?

a. antigens
b. antibodies
c. phagocytes
d. bacteria

2. Which of the following is mentioned last about white blood cells?
a. The average human body contains 25 to 30 billion white blood cells.
b. Certain white blood cells produce antibodies.

c. White blood cells absorb and digest invading germs.
d. Many white blood cells die when they are battling an infection.

3. What is an effect of antibodies persisting in the bloodstream?

a. It prevents new antibodies from being formed.
b. It prevents germs from entering the body.
c. The antibodies are ready if the same type of germ returns.

d. The antibodies can help the white blood cells reproduce.

4. How is the body’s outer skin similar to the membranes surrounding
internal organs?

a. They are not similar.
b. They both make up the body’s first defenses to bacteria and viruses.
c. They both help produce antibodies.
d. They both help produce antigens.

5. Predict how a virus might penetrate the body.
a. through a cut on the arm
b. through the mouth
c. through the nose

d. all of the above

6. In the passage the word spring means
a. the season between winter and summer

b. a metal coil
c. to act suddenly and swiftly
d. to grow from

unit 12_73