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- In response to plant pathogens, plants will ______ hypersensitivity response and ____ salicyclic acid levels. Select one: a. suppress, increase b. suppress, decrease c. promote, decrease d. promote, increaseWhy are encapsolated bacteria generally more pathogenic than un-capsolated strains. a. Because capsule allows the organism to hide in the body of the host. b. because the capsule causes the phagocyte to mutate c. because the capsule protects bacteria from host immune cells d. because the capsule kills the phagocytes e. because the capsule stimulates a potent immune response in the host.Explain why each choice (a-d) is correct or incorrect. Allergens differ from antigens because a. Allergens produce an abnormally large immune response to what is an otherwise harmless particle. b. Allergens do not involve the leucocytes, they simple stimulate the inflammatory response. c. Allergens are only active seasonally and are generally harmless to the body. d. Allergens are primarily plant derived while antigens are bacterial or viral in nature.
- An example of an endogenous microorganism is: A.Fomites b.Skin bacteria present in dermatitis. c.Air d.airbone bacteriawhat is the mechanism of action for penicillins? a. injury to plasma membrane b. inbibition of protein synthesis c. inhibition of cell wall synhesis d. inhibition of nucleic acid synthesis e. none of the above describes the mechanism of action for penicillinsPenicillin obtained from a fungus is : A. Antibiotic B. Antiseptic C. Antibody D. Antiserum
- The information is on the second picture and the questions are on the first which are : 3) What is the normal ( non - allergenic) function of a algae antibody and how does it accomplish this? 4) What is the non-normal ( allergenic ) function of an lgE antibody and how does it accomplish this? 5) How does the release of histamine lead to allergic symptoms ?In the laboratory you observe that IL-4 stimulates the proliferation of B cells, cytotoxic T cells and mast cells. In this case the effect of IL-4 can be described as: a. Antagonism b. Synergy c. Redundancy d. PleiotropyToll-like receptors (TLRS) act to A. cause phagocytic chemotaxis. B. induce phagocytosis. C. bind microbial proteins and polysaccharides. D. destroy microbial cells. You may select zero, one, or many answers.
- Vaccines are given to provide protection against pathogen causing infections. Which of the following statements best describes how vaccines work? a Fever and swelling develop which is the first response in killing a pathogen b. Antibodies in the vaccine provide the body with nonspecific immunity to an antigen. c. An inactivated or killed virus stimulates the body to develop specific immunity to that type of virus. d. Heathy bacteria causes the body to release toxins which will protect the body if later exposed to different type of bacteria.Which of the following pairs are not correctly matched? Select one: a. Transient flora - removed easily by hand washing b. Pathogenic bacteria - can’t be reduced by hand washing c. Resident flora - not removed by antiseptic but inhibited for 24hs d. Effective hand washing - reduction of infectionWhich of the following statements is true? A. Hypersensitivity requires previous exposure to an antigen B. Hypersensitivity is due to the presence of a virus. C. Hypersensitivity occurs in the absence of an antigen. D. Hypersensitivity is synonymous with the term " infection". E. Hypersensitivity occurs when an individual is exposed to an allergen for the first time.