OpenStax Microbiology

OpenStax Microbiology Test Bank Chapter 21: Skin and Eye Infections * = Correct answer Multiple Choice 1. The top part of the skin, which is exposed to the environment, is called: A. adipose tissue B. the dermis C. the epidermis* D. the hypodermis Difficulty: Easy ASM Standard: N/A 2. Which bacterial genus is commonly associated with acne? A. Candida B. Clostridium C. Propionibacterium* D. Salmonella Difficulty: Easy ASM Standard: 23 TESTBANKSELLER.COM 3. Papillomas are also known as: A. comedones B. pustules C. urticaria D. warts* Difficulty: Easy ASM Standard: N/A 4. Tinea corporis is also known as: A. conjunctivitis B. ringworm* C. viral keratitis D. warts Difficulty: Easy ASM Standard: 23 5. The conjunctiva is the: A. boundary of the lens of the eye B. layer of mucus covering the eye C. layer of tissue surrounding the entire eye D. mucous membranes of the eye* Difficulty: Easy ASM Standard: N/A 6. A deep lesion that develops from multiple boils is called a: A. carbuncle* B. furuncle C. macule D. pustule Difficulty: Easy ASM Standard: 23 7. Systemic symptoms are most likely to develop with a: A. carbuncle* B. comedo C. cyst D. pustule Difficulty: Easy ASM Standard: 23 8. Which of the following descrTibEesSiTmBpeAtiNgKo?SELLER.COM A. a highly contagious infection caused by Staphylococcus aureus and Streptococcus pyogenes that causes vesicles, pustules, and bullae* B. a mild and self-limiting viral infection that can be caused by a wide range of infectious agents C. a noncontagious rash (not caused by an infectious agent) that spreads rapidly across the skin D. a systemic fungal infection caused by Candida spp. and other species that is difficult to treat Difficulty: Easy ASM Standard: 23 9. Which of the following is true of the normal skin microbiota? A. It does not change over time. B. It is always identical in all parts of the body. C. It varies between moist and dry areas only, but is consistent in areas of similar moisture content. D. It varies depending on microenvironment and is an important part of the nonspecific immune system.* Difficulty: Moderate ASM Standard: 23, 24 10. One reason that the skin is inhospitable to microbes is that: A. It is moist and hypersaline, which prevents growth by most species of microbes. B. It is relatively lacking in salt and is hypotonic to bacteria. C. It is relatively moist and this inhibits their growth. D. The normal microbiota outcompetes other microbes and inhibits their growth.* Difficulty: Moderate ASM Standard: 23, 24 11. An important difference between sebaceous glands and sweat glands is that: A. Sebaceous glands are not typically associated with hair follicles, whereas sweat glands typically are associated with hair follicles. B. Sebaceous glands are tubular and sweat glands are coiled. C. Sweat glands are found fully within the dermis, whereas sebaceous glands are found fully within the epidermis. D. Sweat glands produce a watery fluid, whereas sebaceous glands produce lipid-rich sebum.* Difficulty: Moderate ASM Standard: N/A 12. How does sebum affect microbial growth on the skin? A. It dries out the skin, reducTinEgSthTeBaAbNiliKtySoEf LmLicEroRCtOoMgrow where it is present. B. It may aid growth by providing nutrients but also has components that inhibit microbial growth.* C. It only aids microbial growth, providing a source of nutrition without generally having any harmful effects on microbes. D. It repels microbes and they cannot grow where it is present, making it an important part of the nonspecific immune response. Difficulty: Moderate ASM Standard: 23, 24 13. Sebum-rich areas of the skin, such as the back, generally harbor which of the following? A. highly mixed microbial populations, including a range of bacteria and fungi B. less diverse microbial populations than other regions* C. more diverse microbial populations than other regions D. varied microbial diversity that is difficult to predict compared with other skin regions Difficulty: Moderate ASM Standard: 23, 24 14. The normal skin microbiota primarily includes: A. bacteria and fungi only B. bacteria, fungi, and viruses* C. bacteria only D. fungi only Difficulty: Moderate ASM Standard: 23, 24 15. The vitreous humor: A. has a microbiota similar to that of the conjunctiva B. has a rich bacterial microbiota, but no fungi C. has a variable and diverse microbial population D. has no normal microbiota* Difficulty: Moderate ASM Standard: 23, 24 16. What is one way you can distinguish between a Streptococcus and a Staphylococcus infection? A. Staphylococcus bacteria are gram negative, whereas Streptococcus bacteria are gram positive. B. Streptococcus bacteria are catalase positive, whereas Staphylococcus bacteria are catalase negative. C. Streptococcus bacteria grow on mannitol salt agar, whereas Staphylococcus bacteria do not. D. Under the microscope, StaTpEhSylTocBoAccNuKs SbaEcLteLriaEfRCOclMusters and Streptococcus bacteria do not.* Difficulty: Moderate ASM Standard: 23 17. Individuals who wear contact lenses are at particular risk of developing which of the following? A. acute bacterial conjunctivitis B. blepharitis C. herpes simplex virus 1 lesions D. keratitis* Difficulty: Moderate ASM Standard: 23 18. Neonatal conjunctivitis is commonly treated with which of the following? A. chloramphenicol B. erythromycin* C. fluoroquinolones D. penicillin Difficulty: Moderate