Ms. Morris’ Lesson
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Transcript of Ms. Morris’ Lesson
Ms. Morris’ LessonAim: How does the body fight infections?
Homework: Immune System Worksheet
Do–Now: Can you write down the complete names for HIV & AIDS?
Mini Lesson: Immunity1.defends body from disease-causing
organisms Antigens – foreign substances i.e. pathogens,
germs, viruses, bacteria etc.2. destroys & removes dead/damaged cells
from body
First Line of Defense:• Skin: keeps pathogens from entering• Mucus, cilia, sneezing, coughing: • Saliva
Second Line of Defense:• Inflammatory Response: fluid & WBC’s attack
pathogens in the area of infection (i.e. cut – swollen, red)
• Phagocytes: WBC’s that engulf & destroy pathogens
Third Line of Defense:• targets specific pathogens• B-cells (WBC): produce antibodies that
destroy pathogen• T-cells (WBC): identify pathogens &
distinguish one kind from another
Antibodies – destroysSpecific antigens
HIV• Human immunodeficiency virus
AIDS• Acquired Immune Deficiency
Syndrome• What do you currently know?
Passive Immunity: antibodies come from another source (i.e. mother – newborn baby)
Active Immunity: You produce your own antibodies by:
1. Having a disease i.e. chicken pox2. Getting a vaccine i.e. polio,
chicken pox etc.
Vaccine: consists of dead or weakened pathogens; they trigger an immune response; body produces antibodies against that disease
Activities
• Part One – go to edusolution.com• Choose “test yourself”. Then choose “LE
by topics”. Then practice the Regents questions on “Homeostasis”.
• Part Two – Create your own PowerPoint by Groups! (See attached)