Biology 9700 · AS & A Level · The circulatory system

The circulatory system — practice question

The diagrams illustrate three kinds of blood cells, and they are all shown to the same scale. Which row displays the cells’ characteristics?

  • Aname of blood cell X: monocyte; engulfs pathogens by endocytosis: Y; each responds to one antigen: Z
  • Bname of blood cell X: monocyte; engulfs pathogens by endocytosis: Z; each responds to one antigen: Y
  • Cname of blood cell X: lymphocyte; engulfs pathogens by endocytosis: Y; each responds to one antigen: Z
  • Dname of blood cell X: lymphocyte; engulfs pathogens by endocytosis: Z; each responds to one antigen: Y

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