MIC 102 Unit 6-1 Exam Questions and Answers All Correct

MIC 102 Unit 6-1 Exam Questions and Answers All Correct Which two of the following are surface barriers that microorganisms must overcome to establish an infection? - Answer-skin mucous membranes Immunology is the study of _____. - Answer-immune responses to foreign substances and microbes The gastrointestinal, genitourinary, and respiratory tracts are internal structures connected with the environment, and are lined with _____. - Answer-mucous membranes The outermost layer of human skin provides an effective barrier against microbial invasion, partly because the cells produce insoluble proteins called - Answer-Blank 1: scleroproteins or keratins The image is a scanning electron microscopic image of the ciliated epithelial cells of the respiratory tract that trap microbes _____ than 10 μm. - Answer-larger Microorganisms typically must overcome several surface - Answer-Blank 1: barriers or physical barriers Which field focuses on the study of immune responses and how they protect the host? - Answer-immunology The outermost layer of human skin provides an effective barrier against microbial invasion, mainly due to the presence of thick, closely packed cells called _____. - Answer-keratinocytes Select the three areas of the human body that are covered by mucous membranes that act as barriers to infection from foreign pathogens. - Answer-genitourinary tract gastrointestinal tract respiratory tract What is the usual fate of microbes greater than 10 μm in diameter upon entering the nasal cavity? - Answer-They are trapped by hairs/cilia lining the nasal cavity, then transported towards the mouth to be expelled. Microbes enter the stomach by _____. - Answer-their presence in the food we consume Which two of the following are innate immune mechanisms present in the urinary tract? - Answer-urea and other waste products kill some bacteria flushing action of urine Most microorganisms that enter the stomach _____. - Answer-are killed by acidic gastric juice