Immunology, Vaccines,and Vaccine Programs Flashcards
define immunity (2)
- security against a particular disease
- non-susceptibility to the invasive or pathogenic effects of microorganisms or helminth parasites or to the toxic effect of antigenic substances
what is an antigen?
any substance that causes the immune system to produce antibodies
give 3 examples of antigens
viruses, bacteria, pollen
define antibody
proteins that bind antigens thus neutralizing them
does an antigen have to be the whole microbe?
no, could just be a protein on a microbe
what are antibodies produced by?
B-lymphocytes
what are antibodies also called?
immunoglobulins
describe the structure and function of antibodies
Y shaped, where the tips of the Y are the active part and are different shapes themselves
are there broad spectrum antibodies? why or why not?
no because they are so specific
how do we get innate (non-specific) immunity?
we are born with it
what does the innate immune system include? (broad and then give 5)
physical and chemical barriers to antigens:
- skkin
- mucous membranes
- body temeprature
- stomach acid
- respiratory tract cilia
what is the first level of innate immunity?
the physical and chemical barriers
what is the second level of innate immunity? (2)
leukocytes: macrophages, neutrophils, monocytes, eosinophils and
NK cells, and dendritic cells (the security guards)
what is the 2nd level of overall immunity?
the acquired/adaptive immunity
what is acquired/adaptive immunity?
response of body defenses to a specific antigen
what does adaptive/acquired immunity depend on?
depends on antibody production
why is adaptive/acquired immunity specific?
antibody production only
how do you increase the strength of the response of the adaptive/acquired immune system?
repeated exposures (MEMORY)
what does the effectiveness of the adaptive/acquired immune response depend on? (5)
- genetics
- health
- antigen dose
- number of previous encounters
- response of innate immunity
what really cool thing can macrophages do in adaptive/acquired immunity?
can chop up bits of antigens as the pahgocytize it and show it to lymphocytes for better learning and antibody production
when giving vaccines, describe the type of immune response/functions of 1st, 2nd, and 3rd dose
1st exposure: primary immune response
2nd exposure: strengthens antibodies
3rd exposure (and any further): lead to innate immunity
describe the reaction strength to 1st, 2dn, and 3rd vaccinations
less/smaller reaction each time
what are the 5 types of immunoglobulins?
- IgM
- IgG
- IgA
- IgE
- IgD
what is IgM?
the first antibody produced
what is IgG?
produced in future immune responses, produced a litte later than IgM, keeps memory, found in greater spikes in future immune responses
what is IgA?
local immunity, in GI tract, resp, tract, conjunctive (ALL MUCOSA)
what is IgE?
associated with inflammatory reactions and parasitic infections, too much can damage self (anaphylaxis)
what is IgD?
somewhat unknown but thought to activate B cells
what are the 2 types of acquired immunity?
- active: body has to work to create protection
2. passive