42) A foreign ________ causes an allergic reaction.

14) ________ are essential for the reproduction of B cells and other types of cells.

22) In rheumatoid arthritis, the immune system attacks the ________.

50) Lymphatic tissue is concentrated in Peyer’s patches in the ________.

49) In what way are lymphatic vessels similar to veins?

13) There are two types of proliferation, one for ________ and one for B cells.

35) Which of the following is an autoimmune disease?

“We need not follow him through the Infant School. It would make a full story in itself. But it was no different from the story of other children. In the Primary School, however, his character began to show. He developed a strong hatred for arithmetic. But he loved stories and songs. And he liked particularly the sound of English words, even when they conveyed no meaning at all. Some of them simply filled him with elation. ‘Periwinkle’ was such a word. He had now forgotten how he learned it or exactly what it was. He had a vague private meaning for it and it was something to do with fairyland. ‘Constellation’ was another.”

“If solitude, or fear, or pain, or grief Should be thy portion, with what healing thoughts Of tender joy wilt thou remember me… …That on the banks of this delightful stream We stood together; and that I, so long A worshipper of Nature, hither came Unwearied in that service…”

“Enlightenment is man’s release from his self-incurred tutelage. Tutelage is man’s ability to make use of his understanding without direction from another.”