Ch18MCAT

Ch18MCAT - 18 Natural Defenses against Disease Multiple...

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18 Natural Defenses against Disease Multiple Choice 1. Which of the following is not one of the first lines of defense against invading pathogens? a. Skin b. Mucus secretion c. Lysozyme in tears d. T cell receptors e. Low pH of the stomach Answer: d 2. Blood is a fluid tissue with a noncellular fluid called a. lymph. b. leukocyte. c. plasma. d. lymphocyte. e. immunoglobulin. Answer: c 3. Nonspecific responses include all of the following components except a. macrophages. b. antibodies. c. eosinophils. d. neutrophils. e. interferons. Answer: b 4. Which of the following is not an adaptation for preventing a pathogen from penetrating the body surface? a. Presence of a normal flora b. Sneeze reflex c. Mucus-covered body surfaces d. Low pH e. Immunological tolerance Answer: e 7. _______ is the generalized bodily response to infections and is accompanied by redness, swelling, heat (increased temperature), and pain. a. Shock b. Inflammation c. DNA repair d. AIDS
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e. None of the above Answer: b 9. E. coli bacteria live in our large intestines and do not normally cause disease. These microorganisms are called a. pathogens. b. antibodies. c. normal flora. d. phagocytes. e. the complement system. Answer: c 10. Each milliliter of blood normally contains about _______ red blood cells and _______ white blood cells. a. 5 billion; 7 million b. 5 million; 7 billion c. 5 thousand; 7 thousand d. 5 million; 7 thousand e. 5 million; 7 million Answer: a 11. Lysozyme is an enzyme that a. digests proteins. b. causes viral-infected cells to lyse.
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Ch18MCAT - 18 Natural Defenses against Disease Multiple...

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