Question

In: Biology

1. If the growth rates of sensitive and resistant strains of the same bacterium were compared,...

1. If the growth rates of sensitive and resistant strains of the same bacterium were compared, the resistant organisms would show a faster growth rate. True or False

2. Cytotoxic T lymphocytes are referred to as CD4+ cells. True or False

3.Antigens recognized by the immune system are termed epitopes. True or False

4.Epitopes must be presented by an antigen-presenting cell to initiate a primary immune response. True or False

5. Dendritic cells function only in phagocytosis. True or False

6. Innate defenses include the skin, mucous membranes, and phagocytes. True or false

7. Fever inhibits the growth of pathogens and aids in tissue repair. True or False

8. Lymphocytes are the cells of the innate defense system. True or False

9. Opportunistic microbiota and resistant strains normally do not contribute to nosocomial infections. true or false

10. It is possible for a person with an infectious disease to have no departure from health. True or False

11. A sporadic disease exhibits an increased incidence, beyond what would be expected. True or False

12. Antitoxins are effective against endotoxins. True or false

Expert Solution

1. True.

This because the resistant variety is not affected by any antibiotic in the medium.

2.False.

Cytotoxic T lymphocytes are called CD 8+ cells.

3. True.

Antigens present int he pathogen have certain chemical groups called Epitopes which are recognized by paratoes present in the antibody variable end.

4.epitope is presented by anitgen presenting cell

Epitopes are presented by antigen presenting cells bound to MHC complexes on the surface of the cell.

5. False.

Primary function of the densritic cells is antigen presentation and allerting the imune system. Phagocytosis is the primary function of monocytes, macrophages and neutrophils.

6. True,.

Innate immunity is there since birth and it protects the body from the invasion of the pthogen and also phagocytosis.

7. True.

Fever is innate immune response where the inflammation caused result in high temperature and fever. to kill microbes.

8. False.

Lymphocytes are part of adaptive immunity.

9. False.

Nosocomal infectiosn are resistant infections which patient aquires from hospitals.

10. True.

Some times a person may be infected with a pathogen and may not show any symptoms of the disease.

gladiator answered 2 years ago

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