How do memory cells develop?
A. Upon reinfection, memory centers in the brain send signals to the bone marrow to induce T-cell and B-cell differentiation.
B. T cells and B cells from the primary response persist and become reactivated.
C. Innate cells are trained to activate new T cells and B cells more quickly with secondary infection.
D. T cells and B cells from the primary infection slowly mutate their receptors over time, priming themselves for the secondary response.
E. Innate cells modify their cell surface receptors to prepare for reinfection.
B
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Which of the following diagnostic procedures measures the curvature of the cornea?
A) fluorescein staining B) ophthalmoscopy C) tonometry D) keratometry
Fill in the blank with the correct medical term, then find those terms in the word search puzzle that follows.
1. A(n) _____________ is the word part that is placed before the root to modify its meaning. 2. The prefix semi- means: “_____________.” 3. The prefixes ex- and exo- mean “outward,” or: “_____________.” 4. The prefixes sym- and syn- mean: “_____________.” 5. The prefix ab- means: “_____________ from.” 6. Infer- has the meaning: “_____________.” 7. The prefixes super- and supra- share the meaning: “_____________.” 8. Hypothermia is a state of abnormally _____________ body temperature. 9. The prefix mal- means “bad,” so the term malabsorption literally means: “bad _____________.” 10. The prefix post- means: “to follow _____________.” 11. The term dialysis literally means, “to loosen through” because the prefix dia- means: “_____________.” 12. Ec- and ecto- mean: “_____________.” 13. Bradykinesia combines brady- with the root kines to mean: “condition of _____________ motion.” 14. The prefix eu- means “normal,” or: “_____________.” 15. The term intervertebral indicates a position _____________ the vertebrae. 
In which renal disease do substances from the immune response to streptococcus bacteria collect in the capillary network of the nephron?
A) nephrotic syndrome B) pyelonephritis C) glomerulonephritis D) acute renal failure
Which is an example of ionizing radiation?
A) radio waves B) microwaves C) ultraviolet light D) visible light