FINAL EXAM are called A) abnormal flora. B) transient flora. 1. The microorganis
ID: 48491 • Letter: F
Question
FINAL EXAM are called A) abnormal flora. B) transient flora. 1. The microorganisms that are regularly found in or on the body, yet do no apparent harm C) variant flora. D) normal flora. 2· The resident microbial population of the human fetus is A) zero. B) sparse. C) complex. D) symbiotic. 3. Which of the following is true about the role normal flora play in maintaining host health? A) They provide a surface that is incompatible for attachment of an invader. B) They establish competition for nutrients and vitamins C) They produce antimicrobial substances. D) They stimulate the immune system. E) All of the above are true. 4. Growth of a parasitic organism in or on the host is refered to as A) colonization. B) infection. C) pathogenism. D) mutualism. 5. A disease-causing microorganism or virus is referred to as a() A) avirulent infection B) colony. C) commensal. D) pathogen.Explanation / Answer
1. D normal flora. These are present all over the body and inside the body too. They prevent the accumulation of pathogens and do not cause harm to the host.
2. A zero. The womb is usually thought to be sterile and without any microbes. But in the case of infection in the mother, these microbes may enter the womb.
3. A, C and D. The normal flora do not allow invaders to settle on the skin and other surfaces. They produce anti microbial molecules which dissuade pathogens from settling. They also are a means of stimulating the immune system so that the immune system is prepared to fight invaders.
4. B. Infection. When a microbe attacks a host it is supposed to be infected. The initial infection then turns into a disease after the microbe multiplies.
5. D Pathogen. A pathogen is one which can cause disease. It can be a virus or a bacterium or any microbe
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