regents biology ann h williams, phd. associate professor of biology university of tampa, tampa, fl...
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Regents Biology
Ann H Williams, PhD.Associate Professor of Biology
University of Tampa, Tampa, FL
IMMUNOLOGY?
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Regents Biology
SC.912.L.14.52 Explain the basic functions of the human immune system, including specific and nonspecific
immune response, vaccines, and antibiotics.
What are your successful strategies in teaching this standard?
Next Generation Sunshine State Standards
What are your challenges in teaching this standard?
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Regents Biology
The specific information students should know about this benchmark are:
*Students will identify and/or explain the basic functions of the human immune system, including specific and nonspecific immune responses.
*Students will describe how the human immune system responds to vaccines and/or antibiotics.
*Students will explain the significance of genetic factors, environmental factors, and pathogenic agents to health from the perspective of both individual and public health.
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Regents Biology
Book published in 2011 by the American Association for the Advancement of Science which describes best practices and
strategies for teaching Biology.
Some ideas from the book:
case studies/ scenarios in the classroom
role playing/play acting
Vision and Change in Undergraduate Biology Education: A Call to Action
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AP Biology 2006-2007
“Fighting the Enemy Within”
Immune System
lymphocytesattackingcancer cell
phagocytic leukocyte
lymphsystem
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Regents Biology
Avenues of attack
Points of entry digestive system respiratory system urinary system genitals break in skin
Pathways for attack circulatory system lymph system
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Regents Biology
Why an immune system? Attack from the outside & inside
lots of organisms want you for lunch! we are a tasty vitamin-packed meal
cells are packages of proteins, carbohydrates & fats no cell wall
animals must defend themselves against invaders viruses
HIV, flu, cold, measles, chicken pox, SARS bacteria
pneumonia, meningitis, tuberculosis fungi
yeast protists
amoeba, Lyme disease, malaria cancer cells
abnormal body cells
What’s forlunch?!
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Regents Biology
How are invaders recognized? Antigens
chemical name tags on the surface of every cell “self” vs. “invader”
disease-causingbacteria
disease-causingvirus
one of yourown cells
antigens say:“I belong here”
antigens say:“I am an invader”
antigens say:“I am an invader”
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Regents Biology
Lines of defense 1st line:
broad, external defense “walls & moats”
skin & mucus membranes
2nd line: broad, internal defense
“patrolling soldiers” phagocyte (eating) WBCs
3rd line: specific, acquired immunity
“elite trained units” lymphocyte WBCs & antibodies
B & T cells
Barriers
Non-specific patrol
Immune system
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Regents Biology
IMMUNOLOGY IS LIKE…
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Regents Biology
1st line: Physical Barriers non-specific defense external barriers
skin & mucus membranes excretions
sweat stomach acid tears mucus saliva
“lick your wounds”
Lining of trachea: ciliated cells & mucus secreting cells
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Regents Biology
2nd: Generalist, broad range patrols Patrolling white blood cells
attack invaders that get through the skin recognize invader by reading antigen
surface name tag
phagocyte cells macrophages “big eaters”
Macrophage “eating” bacteria
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Regents Biology
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Regents Biology
Lymph systemProduction of white blood cells & traps “foreign” invaders
2nd “circulatory” system lymph node
lymph vessels(intertwined amongst blood vessels)
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Regents Biology
Phagocytes
yeastmacrophage
macrophage
bacteria
white blood cells that eat
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Regents Biology
histamines increases blood
flow brings more
white blood cells to fight bacteria
brings more red blood cells & clotting factors to repair
Why do injuries swell?
Bacteria
Blood vessel
Chemicalalarm
signals
Pin or splinter Blood clot
Phagocytes
Swelling
Inflammation injured cells release chemical signals
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Regents Biology
Fever When a local response is not enough
full body response to infection raises body temperature higher temperature helps in defense
slows growth of germs helps macrophages speeds up repair of tissues
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Regents Biology
3rd line: Lymphocytes Specific defense
responds to specific invaders recognizes specific
foreign antigens white blood cells
B cells & antibodiesT cells
B cell
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Regents Biology
B cells & antibodies B cells
white blood cells that attack invaders in blood
mature in Bone marrow Plasma B cells (patrolling)
make antibodies against invader immediately
Memory B cells remembers invader can make antibodies quickly the next time
protects you from getting disease more than once
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Regents Biology
Proteins made by B cells that tag invaders in the blood so macrophages can eat them tag says “this is an invader” gotcha!
biological “handcuffs” antibody attaches to antigen of invader
Antibodies
macrophageeating tagged invaders
invading germs tagged with antibodies Y
Y
YY
YY
Y
B cells releasing antibodies
Y
YY
Y
Y
Y
Y
Y Y
Y
Y
Y
Y
Y
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Regents Biology
Antibodies are like Clothespins-clip onto antigen invader
Tail end is recognized by macrophageDO NOT actually engulf microbe invader
Specific!!!!!
Macrophage
Infection
http://www.youtube.com/watch?v=lrYlZJiuf18&feature=related
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Regents Biology
B cells immune responseinvader
(foreign antigen)
Y
Y
Y
Y
B cellsY
YY
Y
Y
YY
Y
Y
YY
YY
YY
YY
YY
Y
Y
YY
YY
YY
Y
“reserves”
memory B cells
Y
Y
Y
Y
Y
YY
YY
YY
Y
Y
B cellsrelease
antibodiespatrol blood
forever
recognition
10 to 17 days
YY
Y
Y
YY YY
Y
Y
Y
YY
YY
YYY
YYYY
Y
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Regents Biology
Vaccinations Exposure to harmless version of germ
(DECOY) stimulates immune system to produce
antibodies to invader, but no disease rapid response if
future exposure
Most successful against viral diseases
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Regents Biology
Jonas Salk Developed first vaccine
against polio
1914 – 1995
April 12, 1955
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Regents Biology
Polio epidemics
1994: Americas polio free
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Regents Biology
Vaccinations advantage
don’t get illness long term immunity
produce antibodies for life
works against many viruses & bacteria
disadvantage not possible against all invaders
Breastfeeding mother’s milk gives baby
antibodies & keeps baby healthy`
Protecting you from disease
IMPORTANTPROTECTION
antibodies pass from mother to baby in breast milk
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Regents Biology
Deadly Hershey’s Kiss
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Regents Biology
Primary Response 1st time immune system sees antigen
B & T cells respond – slow & lower antibody productionAlso makes B Memory cells (specific)
Secondary Response2nd time immune system sees same antigen
B Memory cells respond – fast & higher antibody production
What is purpose of B Memory cells?
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Regents Biology
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Regents Biology
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AP Biology 2006-2007
What if the attacker gets past the B cells in the blood &
infects some of your cells?
You need trained assassins to kill off these infected cells!
T
Attackof the
Killer T cells!
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Regents Biology
T cells T cells mature in Thymus Helper T cells
sound the alarm for rest of immune system
Killer T cells destroy infected body cells
Memory T cells remembers invader & reacts
against it again quickly
Where’s that?
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Regents Biology
Thymus
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Regents Biology
Attack of the Killer T cells Killer T cells destroy infected body cells
T cell binds to invaded cell secretes perforating protein
punctures cell membrane of infected cell cell bursts
Perforin puncturescell membrane
cell membrane
Killer T cell
cell membrane
invaded cell
vesicle
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Regents Biology
Immune responseinvader
invaders in blood invaders infect cells
B cells T cells
macrophages
helperT cells
patrollingB cells
memoryB cells
memoryT cells
killerT cells
YYY
Y
YY
Y
YantibodiesY Y Y
skinskininvaders in body
YY
Y
Y
YY
Y
YantibodiesY Y Y
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Regents Biology
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Regents Biology
B & T cell & Specificity Game & Visual
1)Construction paper & shapes
2)Visual with no props needed
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Regents Biology
B cellsReceptor recognizes:1.Green circle2.Blue star3.Red smiley face4.Yellow square5.Red square6.Purple heart7.Blue rectangle8.Green square9.Red heart10.Red star11.Yellow oval12.Purple rectangle13.Black heart 14.Red circle
T cellsReceptor recognizes:1.Black heart 2.Green circle3.Red heart4.Red smiley face5.Yellow oval6.Yellow square7.Red square8.Purple heart9.Green square10.Blue rectangle11.Red star12.Purple rectangle13.Red circle14.Blue star
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Regents Biology
Dendritic cellCarrying this shape
To lymph node
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Regents Biology
Diseases of the immune system HIV: Human Immunodeficiency Virus
infects helper T cells helper T cells can’t activate rest of
immune system body doesn’t hear the alarm
AIDS:Acquired ImmunoDeficiency Syndrome immune system is weakened infections by other diseases death from other invading
diseases or cancer
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Regents Biology
HIV & AIDS
Antigen load versus Antibody load
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Regents Biology
Curing you of disease Antibiotics = medicine (decrease
microbial load) advantage
kill bacteria that have successfully invaded you
make you well after being sick
disadvantage use only after sick only good against bacteria possible development of
resistance by bacteria (if don’t use correctly)
can get sick again
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Regents Biology
Immune system malfunctions Auto-immune diseases
immune system attacks own cells lupus
antibodies attack many different body cells
rheumatoid arthritis antibodies causing damage to
cartilage & bone
diabetes insulin-making cells of pancreas
attacked & destroyed
multiple sclerosis T cells attack myelin sheath of
brain & spinal cord nerves fatal
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Regents Biology
Immune system malfunctions Allergies
over-reaction to harmless compounds allergens
proteins on pollenproteins from dust
mitesproteins in animal
saliva body mistakenly
thinks they are attackers
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Regents Biology
B cellsReceptor recognizes:1.Green circle2.Blue star3.Red smiley face4.Yellow square5.Red square6.Purple heart7.Blue rectangle8.Green square9.Red heart10.Red star11.Yellow oval12.Purple rectangle13.Black heart 14.Red circle
T cellsReceptor recognizes:1.Black heart 2.Green circle3.Red heart4.Red smiley face5.Yellow oval6.Yellow square7.Red square8.Purple heart9.Green square10.Blue rectangle11.Red star12.Purple rectangle13.Red circle14.Blue star
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Regents Biology
Dendritic cellCarrying this shape
To lymph node
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AP Biology 2009-2010
Blood Typeantigens & antibodies
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Regents Biology
Blood type; antigens & antibodiesblood type
antigenon RBC
antibodiesin blood
donationstatus
A type A antigenson surface of RBC
anti-B antibodies __
B type B antigenson surface of RBC
anti-A antibodies __
ABboth type A & type B
antigens on surface of RBC
no antibodiesuniversal recipient
O no antigens on surface of RBC
anti-A & anti-B antibodies
universal donor
Matching compatible blood groups is critical for blood transfusions
A person produces antibodies against foreign blood antigens
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Regents Biology
Blood donation
clotting clotting
clotting clotting
clotting clotting clotting
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Regents Biology
HOOK
A University of California, Santa Barbara student had both of his feet amputated after he contracted meningitis in an outbreak that
sickened three other students, school and health officials said.Aaron Loy, an 18-year-old freshman lacrosse player, had both of his feet amputated when the disease affected the blood supply to
his limbs.
Meningitis outbreak: UC Santa Barbara lacrosse player's feet amputated
December 04, 2013|By Alicia Banks and Carla Rivera
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Regents Biology
INFECTION
Immunology Game to Visualize Immune Response to Infection,
Microbial load versus antibody load, & Steps taken to clear Infection
WHO WILL WIN ?MICROBE vs. IMMUNE SYSTEM
Primary & Secondary responses – specific & memory-as a group of 5
Let’s Play!
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Regents Biology
You should have:
INFECTION introduction & case study sheet
Lymph node board
Immune system Game pack contents (bag of balls)-instruction sheet-picture key
Microbial load game pack contents (bags of beans, dice)-instruction sheet-Score card-graphing components
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Regents Biology
Groups of 5 – set up board and assign roles according to the Game setup instructions
Roles:Immunology Game:
Reader Piece mover
Microbial Load Game:Die roller Scorer Bean person
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Regents Biology
Start by reading the Case Study for a primary response
Next, follow the primary immune response instructions
When you see ROLL – have the roller, scorer, & bean personfollow the directions on their bacterial load instruction sheet
Now read the Case Study for a secondary response
Follow the secondary immune response instructions
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Regents Biology
5 Groups to model different things1)Specificity of Immune Response2)Effects of HIV3)Vaccinations4)Autoimmune Issues5)Princeton Meningitis Case
Read case study for each scenario and then model the case study with the INFECTION game!