The immune system usually defends the body against foreign substances that are called:

C. Antigens

Memory is an important function of the immune system because:

B. It allows faster future immune responses.

Immunization with a vaccine works by:

 D. Producing active acquired immunity

A B-Lymphocyte cell is a cell in the immune system that:

A. Is derived from a precursor stem cell

A macrophage is a cell in the immune system that:

E. Can be activated by lymphokines

Which statement is true of NK cells?

C. NK cells are part of the body's innate immunity.

The cells of the body are no longer tolerated, and the immune system treats them as antigens in which type of immunopathologic disease?

A. Autoimmune disease

During the anaphylactic type of hypersensitivity reaction, the plasma cells:

A. Produce antibody called IgE

Which type of hypersensitivity reaction involves activated complement?

B. Type II

What type of lymphocyte matures in the thymus, produces lymphokines, and can increase or suppress the humoral immune response?

E. T Lymphocyte

In the immune system, antibodies are proteins that are:

A. Also termed immunoglobins

Which immunopathology involves a decreased number or activity of lymphoid cells?

C. Immunodeficiency

The humoral immune response involves the production of:

B. Antibodies

Measurement of a specific antibody level in the blood is called:

C. Titer

Which type of immunity may be immediately provided to dental personnel after needle-stick accidents?

B. Acquired passive immunity

All of the following are examples of hypersensitivity reactions except:

A. Systemic lupus erythematosus

Reiter syndrome is:

C. An immunologic disorder

The "target lesion" on the skin is associated with which disease?

D. Erythema multiforme

Tzanck cells are seen in which condition?

A. Pemphigus vulgaris

The oral lesions in Reiter syndrome may resemble:

D. Geographic tongue

Which of the following systemic diseases is not associated w/ aphthous ulcers?

 B. Langerhans cell disease

The two cells that histologically characterize Langerhans cell disease are:

C. Eosinophils and mononuclear cells

Which one of the following is the form of Langerhans cell disease that is characterized by a triad of symptoms?

E. Hand-Schuller-Christian disease

The most benign type of Langerhans cell disease is:

B. Eosinophilic granuloma

The most characteristic oral manifestation of Sjogren syndrome is:

E. Xerostomia

Which of the following statements is false?

D. Skin lesions are common in cicatrical pemphigoid

Which is the most distinct and definitive characteristic that distinguishes pemphigus from pemphigoid?

C. The histologic findings

Desquamative gingivitis may be seen in:

E. All of the above

(cicatrical pemphigoid, pemphigus vulgaris, lichen planus, bullous pemphigoid)

In angioedema, involvement of which of the following tissues could create a life-threatening situation for the patient?

E. Epiglottis

 Which of the following is a pathologic condition that produces a characteristic butterfly-shaped lesion on the face and oral ulcers, occurs more frequently in females than males, and for which the result of a blood test is important to diagnosis?

D Lupus Erythematosus