Immune System Flashcards
What is a pathogen?
Anything that can infect a body and cause disease
What is an antigen?
A substance that the body a]can recognize as foreign. This triggers an immune response. This is found in the surface of pathogens.
What are naive white blood cells?
In experienced. They are not trained yet. They have not had contact against pathogens
What are neutrophils?
A type of white blood cell. 50% of the population of white blood cells. Main task is to eliminate foreign substance. Can tell what pathogens are, but cannot differentiate them.
What are macrophages?
A type of white blood cell. Captures and kill foreign substances. Finds antigens. Very deadly—attacks all around it. Cleans up dead cells and bacteria.
What is in phlegm?
Mucus, saliva, dead cells
What is vasodilation?
The dilation of the blood cells.
What is the first line of defense?
Saliva, tears. Skin, nose hair, cilia, stomach acid, etc.
What is part of the second line of defense?
Non specific hormones and chemicals. These attack anything non-self. Causes collateral damage (these are innate traits).
Inflammation. (Not innate)
What is the third line of defense?
Immune system. Memory, pattern, creation of new weapons. (Antibodies, etc.)
What are four types of T cells?
Helper, killer, suppressor, effector
What do helper T cells do?
Sounds the alarms. Signals immune system cells to go after pathogen
What do killer T cells do? (Cytotoxic cells)
Destroyed infected cells + pathogens
What do suppressor T cells do?
Returns the immune system back to normal after pathogens are gone.
What are effector T cells?
A naive t-cell after being activated.
