Chp 20 Flashcards
what pathogen is a eukaryote?
Giardia
An antibiotic kills 99.9% of a bacterial population. What will be the result of the continued application of this antibiotic?
Through time, the antibiotic will become less effective at killing the bacteria
Why would individuals with HIV sometimes contract a pneumonia infection that’s rare in the rest of the population?
They lack helper T cells.
Which cells are important elements that comprise cell-mediated immunity?
cytotoxic T cells
Which cells are important elements that comprise antibody-mediated immunity?
B cells
What is a vaccine usually composed of?
Inactivated disease-causing microbes
What happens during an autoimmune disease such as multiple sclerosis?
Immune system cells attack healthy body cells
What causes fever?
Macrophages release pyrogens, which cause body temperature to increase
Which immune system protects the body from its own cancerous cells?
Cell-mediated immune system
What happens during an allergic reaction?
Substances that were previously harmless become pathogenic.
