ENHANCEMENT CLASS: BASICS OF IMMUNITY Flashcards
The immune system is composed of wide array of:
• Cells
• Soluble molecules (humoral factors)
• Tissues
That have a role in recognition, interaction, disposal, and regulation during healthy and diseased states.
IMMUNE SYSTEM
Substances that may or may not induce an immune response
ANTIGENS
- Disease-causing (e.g., pathogens, carcinogens)
- Non-disease causing (e.g., food, dust)
ANTIGENS MAY BE FOREIGN
Host’s own proteins, carbohydrates, lipids, nucleic acids
ANTIGENS MAY BE PRESENT IN THE HOST
Is the failure to mount an immune response to an antigen
TOLERANCE
Failure to attack the body’s own proteins and other antigens (a good thing)
SELF-TOLERANCE
Recognize self from non-self and defend against nonself
PRIMARY ROLE OF IMMUNE SYSTEM
IMMUNITY is divided into two types:
- INNATE Immunity
- ADAPTIVE Immunity
INNATE OR ADAPTIVE IMMUNITY?
Present at birth “NATURAL”
INNATE IMMUNITY
INNATE OR ADAPTIVE IMMUNITY?
No prior exposure to pathogen required
INNATE IMMUNITY
INNATE OR ADAPTIVE IMMUNITY?
Little or no memory of prior exposure
INNATE IMMUNITY
INNATE OR ADAPTIVE IMMUNITY?
Non-specific
INNATE IMMUNITY
INNATE OR ADAPTIVE IMMUNITY?
Immediate response
INNATE IMMUNITY
INNATE OR ADAPTIVE IMMUNITY?
Same response upon re-exposure
INNATE IMMUNITY
INNATE OR ADAPTIVE IMMUNITY?
Exposure to pathogen required
ADAPTIVE IMMUNITY
INNATE OR ADAPTIVE IMMUNITY?
Memory of prior exposure
ADAPTIVE IMMUNITY
INNATE OR ADAPTIVE IMMUNITY?
Specific
ADAPTIVE IMMUNITY
INNATE OR ADAPTIVE IMMUNITY?
Slow response
ADAPTIVE IMMUNITY
Faster and increased response upon re-exposure
ADAPTIVE IMMUNITY
NONSPECIFIC DEFENSE MECHANISM
FIRST LINE OF DEFENSE
SECOND LINE OF DEFENSE
SPECIFIC DEFENSE MECHANISM
THIRD LINE OF DEFENSE
FIRST LINE OF DEFENSE
PHYSICAL BARRIERS
CHEMICAL BARRIERS
BIOLOGICAL BARRIERS
SECOND LINE OF DEFENSE
Cellular: Phagocytic Cells Humoral Factors (Acute Phase Reactants, Complement, Cytokine
THIRD LINE OF DEFENSE
- Lymphocytes
- Antibodies
Ability to resist infection by means of normally present body functions
INNATE IMMUNITY
Refers to external and internal defenses that function in the early stages of host defense
INNATE IMMUNITY
Block or limit access to the body (physical barriers)
to
Initiate activation of immune mechanism (humoral and cellular factors)
INNATE IMMUNITY
Block or limit access to the body (physical barriers)
to
Initiate activation of immune mechanism (humoral and cellular factors)
INNATE IMMUNITY