2. Question of the Day Question: Describe our lab “CO 2 and You” to an absent student. (What did we do, how did we do it, what did you learn, what were the results, etc.) Answer: … … … Turn in HW AFTER Quiz!

4. Open-Note Check-In Quiz Use Your Entire Binder- No Particular Recommendations Good Luck!

5. Lung Capacity

8. Notes: Immune System

10. IntroIntro Immune system- how your body defends against harmful viruses, bacteria, & fungi (pathogens) Features multiple layers of defense

11. IntroIntro Allergies are exaggerated responses to foreign bodies Immune system complicates organ transplantation

12. Types of Defenses Non-specific defenses- guards against all pathogens indiscriminately; examples: – skin acts as physical barrier

13. Types of Defenses Non-specific defenses- guards against all pathogens indiscriminately; examples: – skin acts as physical barrier – mucous membranes trap pathogens Staphylococcus auerus (yellow) sticking to mucous (blue) on cilia cells

14. Types of Defenses Non-specific defenses- guards against all pathogens indiscriminately; examples: – skin acts as physical barrier – mucous membranes trap pathogens – acidic environment of stomach is hostile

15. Types of Defenses Non-specific defenses- guards against all pathogens indiscriminately; examples: – skin acts as physical barrier – mucous membranes trap pathogens – acidic environment of stomach is hostile – fever speeds up body responses – white blood cells – inflammatory response – and more

16. Inflammatory Response

17. Types of Defenses Specific defenses- targets certain pathogens – white blood cells mark particular pathogens for destruction & engulf them

18. Antigens & Antibodies Antibodies- body’s proteins that bind to microbes, marking them for destruction Antigens- a foreign molecule that triggers an immune response – Ex: proteins, polysaccharides, toxins

19. Antigens & Antibodies

20. p. 969 A.Q. 1a, 2ab, 3ab, 4a