Chapter 9: The Immune Systems and Mechanisms of Defense Quiz

Which type of cell is responsible for producing and releasing antibodies?

B lymphocytes

Antibiotics can target bacteria for destruction while leaving human cells unaffected. All of the following are differences between human and bacterial cells that can account for this target specificity EXCEPT which one?

Bacterial cells have weaker cell membranes than human cells.

Histamine is released by neutrophils to induce an inflammation response when tissues become damaged.

False

Tears and saliva contain the enzyme dermcidin, which is effective in preventing bacteria from entering the human body.

False

Which of the following classes of antibodies activates the inflammatory response by causing the release of histamine?

IgE

Which of the following is TRUE regarding human immunodeficiency virus (HIV)?

Once inside its human host cell it has to convert its viral RNA into double-stranded DNA.

Which immune system cell must be presented with antigen by an antigen-presenting cell such as a macrophage, in order to become appropriately activated?

T lymphocyte

The figure above illustrates antibody titers produced during a primary and secondary immune response. All of the following statements about the primary and secondary immune response are correct EXCEPT which one?

The antibody level produced in the secondary response is three times greater than that produced during the primary immune response.

Which of the following is TRUE regarding lymph nodes?

They filter lymph fluid, trapping microorganisms and abnormal cells.

The bacteria that normally live on the mucous membranes of the digestive tract and vagina provide protection against infection with harmful disease-producing microorganisms.

True

The body inappropriately responding to a normal, safe substance as if it were a dangerous pathogen is referred to as a(n)

allergy

All of the following are involved in the inflammatory response EXCEPT

antibodies

These two organ systems are integral to a functioning human immune system.

circulatory and lymphatic

Which one of the following enables helper T cells to stimulate and activate other cells of the immune response?

cytokines

Most bacteria are harmless or even beneficial to humans. All of the following are ways that bacteria benefit humans EXCEPT which one?

help prevent infection by populating open wounds and other skin injuries

Which of the following combination of pathogen features would most likely pose the greatest threat to human health

high transmissibility and high virulence

Which one of the following is/are located in the tonsils to filter out many of the microorganisms that enter the throat?

lymphocytes

All of the following are used in making monoclonal antibodies EXCEPT which one?

mouse T cells from thymus

During cytotoxic T cell attack of a target cell, which one of the following is released to pierce the cell membrane of the foreign cell, which ultimately kills the target cell?

perforin

The best way to defend the body from a viral infection is to prevent the infection by using a vaccine.

true