Question

Question 29 4 pts Match the following immunoglobulins with their description crosses the placenta and is known to protect fetus and newborn lobulin produced in response to lgD antigen IgG 9 pts Hide Question 30 l app.honorlock.com is sharing your screen Match the f Clostridium tetan Chlamydia trachomatis Clostridium perfringens Clostridium botulinum sign of infection with this organism causes muscle contraction I Choose This leading STD is an obligate intracellular is sharing your screen

Answer 1

Answer:

Question 29-

The following are matched with the options and explanations of the answer:

Crosses the placenta and is known to protect fetus and newborn- IgG.

Explanation-

The IgG is the only class of immunoglobulin that can pass through the placenta, enabling the mother to transfer immunity to fetus.

First immunoglobulin produced in response to antigen- IgM.

Explanation-

IgM is the first immunoglobulin produced in primary response to antigen and can activate complement system.

Associated with allergies- IgE.

Explanation-

Cross linkage with receptor- bound IgE molecules by antigen induced degranulation of basophils and mast cells; as a result, a variety of pharmacologically active mediators giving rise to allergic manifestations.

Found in secretions like saliva, tears and breast milk- IgA.

Explanation-

IgA is the predominant Ig class in external secretion such as saliva, tears and breast milk and it provides protection against pathogens.

Question 30-

The following are matched with the options and explanations of the answer:

Associated with antibiotic- induced colitis- Clostridium difficile.

Explanation-

The direct toxic effects of antibiotics on the intestine can alter digestive functions and cause pathogenic bacterial (Clostridium difficile) overgrowth leading to inflammation of the colon (i.e. colitis).

Etiologic agent of both gas gangrene and food poisoning- Clostridium perfrigens.

Explanation-

This agent can produce toxins that releases 'gas'- that causes tissue death (i.e. gas gangrene); and this bacteria can also contaminate food that causes food poisoning.

Agent which causes food poisoning leading to a flaccid paralysis- Clostridium botulinum.

Explanation-

This agent produces botulinum toxin under low oxygen condition, these toxins are ingested through improperly processed food in which spores of bacteria survive and causes food poisoning, also affects nervous system causing flaccid paralysis.

Etiologic agent of Lyme Disease- Borrelia burgodorferi.

Explanation-

Lyme Disease is caused by this agent that transmitted to human by ticks; sumpsymp of this disease includes fever, skin rash, headache etc.

Causes a bloody diarrhea when lysogenized with Shiga- toxin producing phage- Escherichia coli.

Explanation-

A serotype of this bacteria can produce Shiga- toxin, when ingested with contaminated food or water, can cause kidney failure and hemorrhagic diarrhea (i.e. bloody diarrhea).

A "pseudomembrane" in the throat is a classic sign of infection with this organism- Corynebacterium diptheria.

Explanation-

This organism causes upper respiratory tract infection by producing a gray covering that looks like a membrane (i.e. "pseudomembrane") over the lining of nose, throat and around tonsils.

Etiologic agent of "whooping cough"- Bordetella pertussis.

Explanation-

This agent is a Gram-negative bacterium that releases toxins, which causes respiratory illness and spread by air through coughing or sneezing of an infected person.

Organism produces a neurotoxin which causes muscle contraction- Clostridium tetani.

Explanation-

This organism tetanus toxin (tetanospasmin); which is a potent neurotoxin that causes contractions of muscles known as 'tetanic spasm'.

This leading STD is an obligate intracellular pathogen- Chlamydia trachomatis.

Explanation-

Chlamydia trachomatis is an obligate intracellular pathogen that causes trachoma and sexually transmitted disease (STD) in humans, that leads infectious blindness.