Question 4: Use the diagram below to answer items 1-5. 1200 106 - HIV 600 105 -T cells de---- ------- 104 1 2 3 Time (years) 4 Number of HIV (per ml of blood) (per mL of blood) Number of T cells

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Give typing answer with explanation and conclusion

Select the correct answer from the answers provided. The cross-linkage of antigens by antibodies is known as a. opsonization b. a cross-reaction c. agglutination d. complement fi xation

Are lymph vessels more similar to arteries or to veins? Explain your answer, giving at least two pieces of evidence.

Question 2 A patient that has never had chickenpox or the vaccine can get shingles from a pox patient O cannot get chickpox from a shingles patient O is unable to get vaccinated O can get chickenpox from a shingles patient