An agricultural worker experiences difficulty breathing which becomes progressively worse. Tests show inflammation and damage of the lung tissue, but IgE antibodies and granulocytes are in the normal ranges. With which disorder of the immune system are these signs and symptoms consistent?
A. allergic reaction
B. type III (immune complex-mediated) hypersensitivity
C. type IV (delayed) hypersensitivity
D. autoimmunity
E. acquired immunodeficiency
Answer: B
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What products of light reactions of photosynthesis are used in the Calvin cycle?
A. oxygen and protons B. carbon dioxide and water C. ATP and NADPH D. ADP and NADP E. glucose and oxygen
You, a 29 year old sexually active male, have discovered some small vesicles on the penis. They are fluid-filled, red, and very painful. This is the second time that you have seen this. The first time around, about 2 months ago, you saw them but managed to ignore them. The lesions went away--no doctor, no treatment. But here they are again. You think that perhaps you picked up this infection six months ago, the last time that you had sex. Identify the likely infection.
A. Candidiasis B. HSV-1 infection C. HSV-2 infection D. Syphilis E. Chlamydia
Civil defense officials usually stock large supplies of nonradioactive iodine, which would be distributed in the event of a release of radioactive iodine. Please explain why
What will be an ideal response?
Which of the following groups provides protection and nourishment to the embryo?
A. all plants B. angiosperms only C. gymnosperms only D. lycophytes only E. bryophytes only