Chapter 21 Flashcards
What is the tough protein of skin that few pathogens can penetrate ?
Keratin
What’s another term for the secondary response ?
The anamnestic response
How long do antibodies take to appear in the secondary immune response & when do they peak ?
Within Hours & Peak At Day 3
Which immune response occurs after the second and subsequent exposures to an antigen ?
The secondary or anamnestic immune response
In which immune response do IgG antibodies form first ?
The secondary or anamnestic
What are autoantibodies ?
Antibodies that fail to distinguish the body’s own molecules from foreign ones & attack host tissues, causing autoimmune diseases
Why do memory T cells allow for a faster immune response than when the body is re-exposed to the same antigen ?
They require fewer steps for activation and they’re much more numerous than Naive T cells.
What is immunodeficiency ?
A condition where the immune system fails to respond vigorously enough
An excessive harmful reaction to antigens is called _____.
Hypersensitivity
What are antibodies ?
Molecules that function to render antigens harmless by neutralization, complement fixation, agglutination, & precipitation.
Which substance secreted by a cytotoxic T cell with inhibit viral replication ?
Interferon
What is immunodeficiency ?
The inability to produce a normal immune response, resulting from a lack of immune cells or other immune mediators such as complement
What the fluid contained inside lymphatic vessels called ?
Lymph
