A bacter inhabits the human nasal cavity wherein it obtains nutrients from secretions. It neither hurts nor services the host. The relationship is thus a(n) _____ one.

You are watching: Which of the following statements regarding antibody function is false?

A. Parasitic

B. Neutral

C. Commensal

D. Mutualisitic

E. Antagonistic

A protozoan and also its residents bacteria attack the body of a worm. The bacteria relax toxins and exoenzymes the immobilize and digest the worm, and also the protozoan and also bacteria absorb the nutrients produced. The relationship in between the protozoan and also the bacteria would finest be defined as

A. Parasitism

B. Commensalism

C. Both commensalism and also parasitism

D. Mutualism

E. A nonsymbiotic relationship

Symptoms are

A. Subjective features of a an illness that only the patient have the right to feel.

B. Target manifestations the a disease that deserve to be it was observed by others

C. Activities tests offered to diagnose a disease.

D. Features of a disease, such together sweating.

E. Objective manifestations of a an illness that can be measured

Chaga\"s an illness is transmitted by a bug with mouthparts that pass through blood vessels. Which type of exposure go this represent?

A. Parenteral route

B. Mucous membrane portal

C. Fomite

D. Skin portal

E. Contact

A human being licks a needle prior to injecting a drug into a vein. The human being later develops a bacterial epidemic of the blood. This is an example of

A. Microbial synergism

B. Microbial antagonism

C. A disruption that the normal microbial population of the blood

D. A member the the microbiota gaining accessibility to one unusual ar in the body.

E. Immune suppression causing disease

Which that the following cases is not a method in i beg your pardon a baby acquires common microbiota?

A. Microorganisms thrive in the respiratory tract tract after ~ the baby\"s very first breath.

B. Microbes cross the placenta during pregnancy.

C. The infant acquires the residential microbiota in the colon after ~ the an initial meal.

D. Microbes get in the nose and mouth when the baby is in the birth canal.

E. Staphylococcus epidermidis is transferred from the hospital employee to the child after delivery.

Which that the adhering to statements concerning the show of the etiology of an illness is FALSE?

A. The doubt agent must cause the disease under investigation when introduced right into a susceptible organize organism.

B. The suspect agent must be the just potential virus present in an illness cases.

C. The doubt agent need to be present in all cases of disease.

Among the virulence factors created by Staphylococcus aureus are hemolysin, coagulase, hyaluronidase, and also enterotoxin. Which of these determinants contribute(s) come the capability of S. Aureus to attack the body?

A. Hemolysin

B. Hyaluronidase

C. Coagulase

D. Enterotoxin

E. Coagulase and hemolysin

Diseases that are induced by modern medical actions are referred to as ____ infections.

A. Opportunistic

B. Endogenous

C. Iatrogenic

D. Subacute

E. Exogenous

The incidence that tuberculosis in the year 2000 in the United says was 12.43/100,000 cases. This means

A. 12.43 that every 100,000 world died the tuberculosis in the us in the year 2000.

B. 12.43 in every 100,000 human being in the US had tuberculosis in the year 2000.

C. 12.43 that every 100,000 situations of tuberculosis were treated in the united state in the year 2000.

D. There to be 12.43 brand-new cases the tuberculosis because that every 100,000 civilization in the united state in the year 2000.

E. There were 12.43 tubercule bacilli every 100,000 microbes in the united state in the year 2000.



A stress, overload of Neisseria gonorrhea has a mutation which has actually caused the to shed the ability to create fimbriae and become much less virulent as a consequence. What role has this microorganism lost?

A. The ability to stop phagocytes death it

B. The capacity to create a latent infection

C. The capacity to develop an endotoxin

D. The capability to relocate from one location in the human body to another

E. The capability to adhere to cells of the body



Ten months after the 2010 earthquake in Haiti, there was a sharp rise in the number of cases that cholera. What to be the many likely source of disease?

A. Foodborne

B. Waterborne

C. Indirect call with contaminated equipment

D. Airborne

E. Direct call with infected individuals



Which that the adhering to pairings of microbe and an illness was disproven utilizing Koch\"s posutlates?

A. Varicella-zoster virus and also chickenpox

B. Haemophilus influenza and the flu

C. Hepatitis B and D and also liver cancer


E. Mycobacetrium leprae and leprosy



(Graph showing increasing percentage native March come September, then decreasing again through November.)

The sample of new cases report in phibìc America represented in this graph is regular with _____ transmission.

A. Housefly

B. Airborne

C. Fecal-oral

D. Direct contact

E. Mosquito vector



A brand-new influenza strain appears and also is spreading rapidly. What measures can be taken by public health and wellness agencies to stop the spread?

A. Education members that the public about ways to defend themselves.

B. Educate the public, encourage vaccination, and also treat those who are infected.

C. Shut under public transportation.

D. Identify and also treat world who space infected.

E. Facilitate access to vaccines.



(Map of phibìc & southern America)

The dots top top the map represent reported situations of a disease. This distribution is a(n) ______ pattern

A. Pandemic

B. Epidemic

C. Endemic

D. Emerging

E. Sporadic



Phagocytic cell in the epidermis recognized as _______ add to its capability to prevent microbial invasion.

A. Herbal killer lymphocytes

B. Wandering macrophages

C. Microglia

D. Dendritic cells

E. Neutrophils



Response to certain pathogens that have the right to improve with succeeding exposure is

A. The an initial line the defense.

B. The second line of defense

C. The third line the defense.

D. Microbial antagonism

E. Innate immunity



What perform the sleep cavity, mouth, and also urinary system have actually in common?

A. They are lined v mucous membranes.

B. They space lined v tightly pack dead cells.

C. The outer layers remain intact for many days.

D. They have actually roles in excretion of waste products.

E. They space poorly vascularized.



Which the the following contributes to protecting the eyes from microbial invasion?

A. Tears mechanically do the washing up particles from the eyes.

B. Tears and also mucus integrate to trap microbes and also remove them.

C. A mucus layer traps and also removes microbes.

D. Tears contain lysozyme and also salt and also mechanically do the washing up particles from the eyes.

E. Tears contain lysozyme and also salt.



What is the function of NK cells?

A. They release toxins to damages helminth parasites.

B. They release defensins to damages bacteria.

C. They relax interferons in response to detecting virus particles.

D. Lock phagocytose virus particles.

E. They identify and also poison virus-infected cells.



Which that the complying with statements concerning the alternative complement equipment is TRUE?

A. The is more efficient 보다 the classic pathway.

B. The is not useful in the early on stages the fungal infection.

C. It works best on Gram-positive bacteria.

D. Its activation is elevation of antibodies

E. That plays a very far-ranging role in remove of parasitic helminthes.



The contents of the second line of defense versus microbes may be characterized as

A. Detecting the distinct features of details pathogens.

B. Responders come invasion.

C. Passive barriers.

D. Instrument to combine the very first line of defense.

E. Both passive barriers and also detecting specific virus features.



(pic that a cell v C5a & C3a it is registered & various other \"particles\" leaving)

the process shown in the figure will command to

A. Formation of NETS

B. Formation of MAes

C. Chmeotaxis and opsonization

D. Capillary constriction

E. Vasodilation



Which the the complying with statements is TRUE the eosinophils?

A. They develop the coating of a virus by complement.

B. Lock secrete toxins onto the surface ar of helminth parasites.

C. They are in intact skin, sebum, tears, etc.

D. They decrease during allergy reaction.

E. They relax prostaglandins and also leukotrienes in response to microbes.



One of the advantages of adaptive immune over inherent immunity is

A. A huge selection of cell are produced in response to one infection.

B. The an answer targets classes of pathogens instead of specific pathogens.

C. The ability to known antigens common to numerous microbes.

D. The solution is much faster.

E. The an answer is targeted versus a solitary pathogen.



Adaptive immune is sometimes additionally called gained immunity. I beg your pardon of the adhering to statements provides a basis for the alternate name?

A. Set off lymphocytes produce daughter cells the are identical in specificity and function.

B. Set off lymphocytes may persist for years in the body.

C. To become activated, lymphocytes require exposure come the antigenic determinant because that which they are specific.

D. Lymphocytes that the adaptive immune mechanism are highly specific for a single antigenic determinant.

E. Lymphocytes reactive to normal body contents are removed.



Which that the adhering to is an exogenous antigen?

A. The malaria parasite inside a red blood cell

B. A noninfected human cell

C. A bacterium exterior a cell

D. A bacterium within a cell

E. A virus within a cell



In what method is the lymphatic system similar to the circulatory system?

A. The lymphatic system is also a circulatory system.

B. The same varieties of cells flow through both systems.

C. The ingredient of lymphatic liquid is similar of that of blood plasma.

D. The lymph nodes have the right to contract come push fluid through the system.

E. Liquid flows from bigger vessels come capillaries.



The white blood cells mainly responsible for adaptive immunity are

A. B lymphocytes and also T lymphocytes

B. Macrophages and neutrophils.

C. Macrophages and also eosinophils.

D. Neutrophils and dendritic cells.

E. NK lymphocytes and also neutrophils.



(illustration the looks prefer a snowflake)

The form of immunoglobulin illustrated here is

A. IgE

B. IgA

C. IgG

D. IgD

E. IgM



The Fc part of one antibody is formed by

A. The light chains only.

B. Portions of both the hefty chains only.

C. The variable areas of the hefty chains.

D. The variable regions of the light chains.

E. One hefty chain.



Which the the following statements concerning antibody role is FALSE?

A. They have the right to penetrate hold cells to bind intracellular antigens.

B. They deserve to facilitate phagocyte attack on bacteria through a capsule (glycocalyx).

C. They can facilitate cytotoxic assault by natural killer lymphocytes.

D. They can bind much more than one virus at a time, developing complexes.

E. They have the right to prevent virus attachment to hold cells.



Which of the complying with statements concerning B cell receptors (BCRs) is FALSE?

A. They room bound to the surface of B lymphocytes and also have two antigen-binding sites.

B. Castle are developed in solution to an encounter v an antigen.

C. Researchers estimate the each person forms at least 1011 different species of B lymphocytes with distinctive BCRs.

D. They are complementary in shape to a specific antigenic determinant that they may or might not encounter.

E. Every B lymphocyte is randomly generated with antibody variable regions that identify its BCR.



Which of the adhering to pairs that lymohoctye and glycoprotein is MISMATCHED?

A. TR: CD25

B. Th2: CD4


D. Th1: CD8

E. Tr: CD4



(pic of interaction in a lymph node)

What will be the direct an outcome of the interaction displayed in this figure? (This communication is occurring in a lymph node.)

A. Activation the a helper T lymphocyte

B. Activation the a B lymphocyte

C. Activation of a cytotoxic T lymphocyte

D. Clonal deletion of a B lymphocyte

E. Clonal deletion that a T lymphocyte



The function of dendrites in the adaptive immune an answer is to

A. Attack and also destroy invading pathogens,

B. Procedure endogenous antigens for presentation top top MHC i molecules

C. Distinguish between endogenous and also exogenous antigens.

D. Detect auto-reactive lymphocytes and trigger apoptosis.

E. Degrade exogenous antigens for presentation top top MHC II molecules.



When immunization level in a population are high, _____ gives protection from epidemic for at-risk persons who cannon it is in immunized.

A. Herd immunity

B. Adjuvant therapy

C. Variolation

D. Contact immunity

E. Active immunization



Pathogens may be attenuated for use in vaccines by

A. Genetic manipulation

B. Increasing the virus for numerous generations in tissue culture cells.

C. Treatment v formaldehyde.

D. Genetic manipulation coupled through treatment through formaldehyde.

E. Genetic manipulation and/or increasing the microorganism for several generations in tissue society cells.



What form of vaccine is the hepatitis B vaccine?

A. A recombinant vaccine composed of a solitary antigen the the hepatitis virus

B. A vaccine produced by treating the virus with formaldehyde

C. Inactivated totality pathogen

D. Toxoid vaccine

E. Attenuated vaccine



An infectious condition researcher isolates the pathogen responsible because that an emerging disease. The microbe is grown in the lav for might generations. A preparation of the laboratory-grown microbe is treated v ionizing radiation and also then tested because that its potential together a vaccine. What type of vaccine is this?

A. Attenuated

B. Toxoid

C. Combination

D. Subunit

E. Inactivated whole



The saliva of a very venomous reptile is found to save multiple toxicity compounds. What is a practical technique to providing people with security from the deadly impacts of a bite native this reptile?

A. Use recombinant techniques to prepare modified execution of the toxins.

B. Prepare extracts the the toxins, inactivate them, and use lock one at a time in a collection of immunizations.

C. Prepare antitoxin from the blood of civilization who survived bites to prepare antisera.

D. Prepare hybridomas details for each toxin and use the resulting monoclonal antibodies for passive immunotherapy.

E. Prepare antitoxins by immunizing a huge animal v the toxins, and use extract antibodies for treating exposed persons.



Monoclonal antibodies have the right to be used for

A. Labeled antibodies in immunoassays

B. Passive immunization.

C. Energetic immunization.

D. Passive immunization and also labeled antibodies in immunoassays.

E. Energetic immunization and agglutination assay reagents.



(Pic of an assay)

The diagnostic assay stood for in the figure is useful when.

A. Verifying the presence of a pathogen.

B. Identify the concentration of antitoxin in sera.

C. One immune solution is also weak to be detected by other means.

D. One immune an answer may an outcome in production of a mix of antibodies against complex antigens.

E. Determining blood type.



(Pic v substrate & colored product labeled)

Which type of antibody assay is represented in this figure?

A. A straight ELISA

B. A west blot

C. An immunodiffusion assay

D. One indirect ELISA

E. An indirect immunofluorescence assay



Which of the following is NOT thought about a hypersensitivity reaction?

A. Immune system attack on the thyroid gland

B. Itchy eyes and also a runny nose in a dusty environment

C. A rash led to by poison ivy

D. Dermatitis at the site of a steel watchband

E. Breaking right into hives after eat strawberries



Which of the following immunoglobulins is developed by plasma cells in an answer to one allergen?

A. IgA

B. 19G

C. IgD

D. 19M

E. 19E



The redness, swelling and itching of urticarial is because of _____ release.

A. Leukotriene

B. Kinin and also protease

C. Protease

D. Histamine

E. Kinin



(Pic that a cabinet (I think) # 62 on paper)

The events illustrated in the figure are component of a(n) ______ disorder.

A. Type I hypersensitivity

B. Kind II hypersensitivity

C. Kind III hypersensitivity

D. Autoimmune

E. Immunodeficiency



An accident victim receive a blood transfusion. Shortly therafter, he begins to have challenge breathing, develops a fever, and also experiences nausea and also vomiting.Which the the following is the most likely interpretation of the events?

A. The blood transfusion to be mismatched and contained pyrogens

B. The blood transfusion contained pyrogens

C. The recipient had actually previously to be exposed to foreign blood team antigens

D. The blood transfusion was mismatched.

E. The blood transfusion was mismatched and also the recipient had actually previously been exposed to the international blood team antigens



Which that the adhering to could result in hemolytic an illness of the newborn?

A. Rh-positive mother and also Rh-negative father

B. Rh-negative mother and Rh-negative father

C. Rh-positive mother and Rh-positive father

D. Rh-negative mother and also Rh-positive father

E. Either Rh-positive and also Rh-negative dad or Rh-negative mother and Rh-positive father



an farming worker experiences an obstacle breathing, i beg your pardon becomes progressively worse. Tests display inflammation and also damage of the lung tissue, yet IgE antibodies and also granulocytes are in the typical ranges. V which disorder that the immune device are this signs and also symptoms consistent?

A. Got immunodeficiency

B. Allergy reaction

C. Autoimmunity

D. Type III (immune comlex-mediated) hypersensitivity

E. Form IV (delayed) hypersensitivity



A human being with no siblings or children receives a kidney transplant. The kidney is an example of

A. Dermograft

B. Autograft

C. Isograft

D. Allograft

E. Xenograft



Which that the following statements concerning rheumatoid arthritis (RA) is TRUE?

A. Accumulations that antibody complexes lead to inflammation in and destruction of the joints.

B. There is no genetic influence on the likelihood of developing RA.

C. It occurs in humans and animals.

D. The symptoms are due to damage caused through cytotoxic T cells.

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E. The start of condition is clearly correlated with having actually ben infected v a details microbe.



(pic the HIV epidemic cycle)

The number represents the HIV infection cycle. What virus-specified protein are forced for the occasions indicated through 1 and also 2? (Be certain they room in the correct sequence.)