A bacter inhabits the person nasal cavity whereby it obtains nutrient from secretions. It neither damages nor benefits the host. The relationship is because of this 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 its residents bacteria invade the body of a worm. The bacteria release toxins and exoenzymes the immobilize and also digest the worm, and the protozoan and bacteria absorb the nutrient produced. The relationship between the protozoan and the bacteria would ideal be explained as

A. Parasitism

B. Commensalism

C. Both commensalism and also parasitism

D. Mutualism

E. A nonsymbiotic relationship

Symptoms are

A. Subjective qualities of a disease that just the patient deserve to feel.

B. Objective manifestations the a an illness that have the right to be observed by others

C. Activities tests offered to diagnose a disease.

D. Attributes of a disease, such together sweating.

E. Objective manifestations of a condition that can be measured

Chaga"s condition is transmitted through a bug with mouthparts that penetrate blood vessels. Which kind of exposure does this represent?

A. Parenteral route

B. Mucous membrane portal

C. Fomite

D. Skin portal

E. Contact

A person licks a needle before injecting a drug right into a vein. The human later develops a bacterial epidemic of the blood. This is an example of

A. Microbial synergism

B. Microbial antagonism

C. A disruption of the common microbial population of the blood

D. A member of the microbiota gaining access to an unusual place in the body.

E. Immune suppression resulting in disease

Which of the following instances is no a means in i beg your pardon a infant acquires normal microbiota?

A. Microorganisms grow in the respiratory tract tract ~ the baby"s very first breath.

B. Microbes overcome the placenta throughout pregnancy.

C. The infant acquires the residential microbiota in the colon after the first meal.

D. Microbes enter the nose and mouth as soon as the infant is in the birth canal.

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

Which that the following statements concerning the demonstrate of the etiology of an illness is FALSE?

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

B. The suspect agent have to be the just potential pathogen present in condition cases.

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

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

A. Hemolysin

B. Hyaluronidase

C. Coagulase

D. Enterotoxin

E. Coagulase and hemolysin

Diseases that space induced by modern-day medical measures 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 states was 12.43/100,000 cases. This means

A. 12.43 of every 100,000 human being died of tuberculosis in the us in the year 2000.

B. 12.43 in every 100,000 civilization in the US had actually tuberculosis in the year 2000.

C. 12.43 of every 100,000 instances of tuberculosis to be treated in the us in the year 2000.

D. There were 12.43 new cases of tuberculosis for every 100,000 civilization in the united state in the year 2000.

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



A stress, overload of Neisseria gonorrhea has a mutation which has caused it to lose the capacity to create fimbriae and become much less virulent together a consequence. What duty has this microorganism lost?

A. The capability to protect against phagocytes killing it

B. The ability to develop a latent infection

C. The capability to develop an endotoxin

D. The capacity to relocate from one ar in the body to another

E. The capability to adhere to cells of the body



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

A. Foodborne

B. Waterborne

C. Indirect contact with contaminated equipment

D. Airborne

E. Direct call with infected individuals



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

A. Varicella-zoster virus and chickenpox

B. Haemophilus influenza and the flu

C. Hepatitis B and also D and liver cancer

D. HIV and also AIDS

E. Mycobacetrium leprae and leprosy



(Graph showing boosting percentage from March to September, climate decreasing again with November.)

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

A. Housefly

B. Airborne

C. Fecal-oral

D. Straight contact

E. Mosquito vector



A new influenza stress, overload appears and also is spreading rapidly. What measures can be bring away by public wellness agencies to avoid the spread?

A. Educate members of the public around ways to protect themselves.

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

C. Shut under public transportation.

D. Identify and also treat human being who room infected.

E. Facilitate access to vaccines.



(Map of phibìc & south America)

The dots top top the map stand for reported instances of a disease. This circulation is a(n) ______ pattern

A. Pandemic

B. Epidemic

C. Endemic

D. Emerging

E. Sporadic



Phagocytic cell in the epidermis well-known as _______ add to its capability to avoid microbial invasion.

A. Organic killer lymphocytes

B. Wandering macrophages

C. Microglia

D. Dendritic cells

E. Neutrophils



Response to details pathogens that deserve to improve with subsequent exposure is

A. The an initial line the defense.

B. The 2nd line that defense

C. The 3rd line of defense.

D. Microbial antagonism

E. Innate immunity



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

A. They room lined with mucous membranes.

B. They space lined v tightly packed dead cells.

C. The external layers remain intact for plenty of days.

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

E. They room poorly vascularized.



Which that the following contributes come protecting the eye from microbial invasion?

A. Tears mechanically flush particles native the eyes.

B. Tears and also mucus incorporate to catch microbes and also remove them.

C. A rubber layer traps and removes microbes.

D. Tears save lysozyme and also salt and also mechanically flush particles from the eyes.

E. Tears save lysozyme and salt.



What is the duty of NK cells?

A. They release toxins to damages helminth parasites.

B. They relax defensins to damages bacteria.

C. They release interferons in solution to detecting virus particles.

D. They phagocytose virus particles.

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



Which of the adhering to statements worrying the alternative complement solution is TRUE?

A. That is much more efficient 보다 the classical pathway.

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

C. The works best on Gram-positive bacteria.

D. That activation is live independence of antibodies

E. That plays a very significant role in remove of helminth helminthes.



The materials of the second line the defense against microbes might be characterized as

A. Detecting the distinctive features of details pathogens.

B. Responders come invasion.

C. Passive barriers.

D. Instrument to strengthen the very first line the defense.

E. Both passive barriers and detecting specific pathogen features.



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

the process shown in the figure will command to

A. Formation of NETS

B. Development of MAes

C. Chmeotaxis and opsonization

D. Capillary constriction

E. Vasodilation



Which the the complying with statements is TRUE that eosinophils?

A. They create the coating the a microorganism by complement.

B. Castle secrete toxin onto the surface ar of helminth parasites.

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

D. They decline during allergy reaction.

E. They release prostaglandins and also leukotrienes in solution to microbes.



One that the advantages of adaptive immune over natural immunity is

A. A huge range of cells are produced in solution to one infection.

B. The response targets class of pathogens instead of certain pathogens.

C. The ability to known antigens typical to plenty of microbes.

D. The response is much faster.

E. The response is targeted against a solitary pathogen.



Adaptive immune is sometimes additionally called got immunity. I beg your pardon of the complying with statements gives a basis for the different name?

A. Triggered lymphocytes produce daughter cells that are the same in specificity and function.

B. Caused lymphocytes may persist for years in the body.

C. To come to be activated, lymphocytes call for exposure to the antigenic determinant for which they room specific.

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

E. Lymphocytes reactive to normal body components are removed.



Which the the following is one exogenous antigen?

A. The malaria parasite inside a red blood cell

B. A noninfected human being 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 additionally a circulatory system.

B. The same types of cells circulation through both systems.

C. The composition of lymphatic fluid is similar of the of blood plasma.

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

E. Fluid flows from larger vessels come capillaries.



The white blood cells mostly responsible for adaptive immune are

A. B lymphocytes and T lymphocytes

B. Macrophages and also neutrophils.

C. Macrophages and eosinophils.

D. Neutrophils and also dendritic cells.

E. NK lymphocytes and neutrophils.



(illustration that looks favor a snowflake)

The form of immunoglobulin depicted here is

A. IgE

B. IgA

C. IgG

D. IgD

E. IgM



The Fc part of one antibody is created by

A. The irradiate chains only.

B. Parts of both the hefty chains only.

C. The variable regions of the heavy chains.

D. The variable areas of the light chains.

E. One hefty chain.



Which the the complying with statements regarding antibody role is FALSE?

A. They deserve to penetrate host cells to tie intracellular antigens.

B. They have the right to facilitate phagocyte assault on bacteria v a capsule (glycocalyx).

C. They deserve to facilitate cytotoxic attack by natural killer lymphocytes.

D. They deserve to bind more than one virus at a time, creating complexes.

E. They deserve to prevent virus attachments to hold cells.



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

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

B. They are created in solution to one encounter with an antigen.

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

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

E. Every B lymphocyte is randomly produced with antibody variable areas that identify its BCR.



Which of the complying with pairs that lymohoctye and glycoprotein is MISMATCHED?

A. TR: CD25

B. Th2: CD4


D. Th1: CD8

E. Tr: CD4



(pic of communication in a lymph node)

What will be the direct result of the interaction shown in this figure? (This interaction is arising in a lymph node.)

A. Activation of a helper T lymphocyte

B. Activation of a B lymphocyte

C. Activation the a cytotoxic T lymphocyte

D. Clonal deletion of a B lymphocyte

E. Clonal deletion the a T lymphocyte



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

A. Attack and also destroy invading pathogens,

B. Process endogenous antigens for presentation on MHC ns molecules

C. Distinguish in between endogenous and exogenous antigens.

D. Recognize auto-reactive lymphocytes and also trigger apoptosis.

E. Degrade exogenous antigens because that presentation on MHC II molecules.



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

A. Herd immunity

B. Adjuvant therapy

C. Variolation

D. Contact immunity

E. Energetic immunization



Pathogens might be attenuated for use in vaccines by

A. Hereditary manipulation

B. Raising the microorganism for number of generations in tissue culture cells.

C. Treatment with formaldehyde.

D. Genetic manipulation coupled through treatment v formaldehyde.

E. Hereditary manipulation and/or raising the pathogen for several generations in tissue society cells.



What kind of vaccine is the hepatitis B vaccine?

A. A recombinant vaccine written of a single antigen the the hepatitis virus

B. A vaccine created by treating the virus through formaldehyde

C. Inactivated totality pathogen

D. Toxoid vaccine

E. Attenuated vaccine



An infectious an illness researcher isolates the microorganism responsible because that an arising disease. The microbe is get an impression in the lav for may generations. A ready of the laboratory-grown microbe is treated through ionizing radiation and then tested for its potential as a vaccine. What kind of vaccine is this?

A. Attenuated

B. Toxoid

C. Combination

D. Subunit

E. Inactivated whole



The saliva of a extremely venomous reptile is discovered to save multiple toxic compounds. What is a practical approach to providing civilization with defense from the deadly impacts of a bite from this reptile?

A. Usage recombinant techniques to prepare modified versions of the toxins.

B. Prepare extracts the the toxins, inactivate them, and also use castle one in ~ a time in a series of immunizations.

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

D. Prepare hybridomas certain for every toxin and use the resulting monoclonal antibodies because that passive immunotherapy.

E. Prepare antitoxins by immunizing a large animal through the toxins, and use extract antibodies for dealing with exposed persons.



Monoclonal antibodies deserve 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 represented in the figure is valuable when.

A. Verifying the presence of a pathogen.

B. Determining the concentration of antibodies in sera.

C. An immune solution is too weak to it is in detected by other means.

D. One immune solution may result in production of a mix of antitoxin against complex antigens.

E. Determining blood type.



(Pic v substrate & colored product labeled)

Which form of antibody assay is represented in this figure?

A. A straight ELISA

B. A west blot

C. An immunodiffusion assay

D. An indirect ELISA

E. An indirect immunofluorescence assay



Which the the complying with is NOT thought about a hypersensitivity reaction?

A. Immune system assault on the thyroid gland

B. Itchy eyes and a runny sleep in a dusty environment

C. A rash led to by toxicity ivy

D. Dermatitis at the site of a metal watchband

E. Breaking right into hives after eating strawberries



Which that the complying with immunoglobulins is produced by plasma cells in solution to an allergen?

A. IgA

B. 19G

C. IgD

D. 19M

E. 19E



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

A. Leukotriene

B. Kinin and also protease

C. Protease

D. Histamine

E. Kinin



(Pic the a cell (I think) # 62 ~ above paper)

The events illustrated in the number are part of a(n) ______ disorder.

A. Form I hypersensitivity

B. Kind II hypersensitivity

C. Kind III hypersensitivity

D. Autoimmune

E. Immunodeficiency



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

A. The blood transfusion to be mismatched and also contained pyrogens

B. The blood transfusion included pyrogens

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

D. The blood transfusion was mismatched.

E. The blood transfusion to be mismatched and also the recipient had previously to be exposed come the foreign blood team antigens



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

A. Rh-positive mother and Rh-negative father

B. Rh-negative mother and also Rh-negative father

C. Rh-positive mother and also Rh-positive father

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

E. One of two people Rh-positive and also Rh-negative father or Rh-negative mother and also Rh-positive father



an farming worker experiences challenge breathing, which becomes significantly worse. Tests present inflammation and also damage that the lung tissue, yet IgE antibodies and also granulocytes space in the regular ranges. Through which disorder the the immune mechanism are these signs and also symptoms consistent?

A. Gained immunodeficiency

B. Allergy reaction

C. Autoimmunity

D. Form III (immune comlex-mediated) hypersensitivity

E. Form IV (delayed) hypersensitivity



A human with no siblings or kids receives a kidney transplant. The kidney is an instance of

A. Dermograft

B. Autograft

C. Isograft

D. Allograft

E. Xenograft



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

A. Accumulations of antibody complexes bring about inflammation in and destruction that the joints.

B. Over there is no genetic influence top top the likelihood of emerging RA.

C. It wake up in humans and also animals.

D. The symptoms are due to damages caused by cytotoxic T cells.

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E. The start of an illness is plainly correlated with having actually ben infected v a certain microbe.



(pic the HIV infection cycle)

The figure represents the HIV epidemic cycle. What virus-specified proteins are forced for the events indicated through 1 and also 2? (Be certain they are in the exactly sequence.)