Immune System (antibodies, antivirals, and vaccines + B and C cells)

Your immune system is designed to protect you against _________

pathogens

Your skin is part of your _____ line of defense

first

What does your second line of defense include?

non-specific white blood cells such as macrophages

What does your third line of defense include?

B and T cells

What do antibiotics target?

Bacteria

What is one way that antibiotics destroy bacteria?

Damage bacterial cell walls/ block the production of critical proteins the bacteria may need

What are antibodies?

Proteins made by some of your immune cells that can be used to fight pathogens

What are vaccines?

A way of exposing your body to an inactive form of a pathogen

What types of people cannot receive a vaccine?

People with compromised immune systems/newborns/a pregnant woman

What does an antiviral need to do?

Stop the virus without negatively affecting your own cells

B cells =

humoral immunity

function of b cells

Produce antibodies that neutralize or destroy pathogens in body fluids ("humors")

activation of b cells

B cells activated when exposed to antigen and receive help from helper T cells

after activation of b cells

- Differentiate into plasma cells (which secrete antibodies)

- Some become memory B cells for faster response upon future exposure

key product of b cells

Antibodies (immunoglobulins) - proteins that specifically bind antigens

T cells

cell mediated immunity

function of T cells

Directly attack infected or abnormal cells, or help coordinate the immune response.

activation of t cells require

Require antigen presentation via MHC (Maior Histocompatibility Complex) molecules

MHC I activates

CD8+ T cells

MHC II activates

CD4+ T cells

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