Exam 17: Immunity and Infection

An infection that travels throughout the body is called

Pathogens can enter the body through penetration of the skin,by inhalation,or by ingestion.

Define "allergy" and briefly explain how an allergic response occurs.List at least three common allergens and two strategies for dealing with allergies.

Which of the following is not considered a pathogen?

The two main types of lymphocytes are T cells and B cells.

Which of the following is not considered a common allergen?

Swollen lymph nodes are an indication of

A person who is exposed to a disease and is subsequently injected with antibodies produced by others has been given

The release of histamines does not cause ______ in the affected area.

Vessels and organs that pick up excess fluids,filter out disease-causing organisms and other waste products,and return cleansed fluid to general circulation belong to the ______ system.

An organism that causes disease is a(n)

Vaccines confer ______ immunity.

The ability of memory lymphocytes to remember previous infections is known as

Define "pathogen" and trace the chain of infection through its various steps.Give at least three strategies for breaking the chain of infection.

Lymphocytes generated during an initial infection that circulate in the body for years and quickly destroy that infection if it ever appears again are called ______ cells.

Discuss the concept of emerging infectious diseases.Identify at least three specific emerging infections and three factors contributing to disease emergence worldwide.

Multiple sclerosis is an example of an autoimmune disease.

Mycoplasmas are a common cause of pneumonia among college students.

T cells and B cells are the main types of

Rabies is most often transmitted by