Components of the Blood

Review Questions

White blood cells:

  1. can be classified as granulocytes or agranulocytes
  2. defend the body against bacteria and viruses
  3. are also called leucocytes
  4. all of the above

Hint:

D

Platelet plug formation occurs at which point?

  1. when large megakaryocytes break up into thousands of smaller fragments
  2. when platelets are dispersed through the bloodstream
  3. when platelets are attracted to a site of blood vessel damage
  4. none of the above

Hint:

C

In humans, the plasma comprises what percentage of the blood?

  1. 45 percent
  2. 55 percent
  3. 25 percent
  4. 90 percent

Hint:

B

The red blood cells of birds differ from mammalian red blood cells because:

  1. they are white and have nuclei
  2. they do not have nuclei
  3. they have nuclei
  4. they fight disease

Hint:

C