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Phagocyte

Summary of Chapter 43

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Chapter 43 The Immune System Overview: Reconnaissance, Recognition and Response Pathogens: infectious agents that cause disease Constantly attacking animals Infect a wide variety of animals (including humans) Types of pathogens: Viruses Bacteria Protists Fungi Immune system: The animal?s way of fighting off the Pathogens Made up of many different things (Macrophages, proteins, etc.) Layers of Defense: Outer layer: (barrier) Such as skin or shell Significant obstacle to invasion by microbes(pathogens) Not fully sealed (b/c need to breathe, etc) Additional barrier defenses: such as chemical secretions that trap/kill microbes ? guard the body?s entrances and exits.

Specific & non specific immunity

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Gurjit Singh Mitosis and meiosis Karen McLeary Produce an annotated word document or draw an annotated poster showing and explain the stages of mitosis and meiosis, explain how the behaviour of chromosomes leads to variation in cells. In mitosis the new cells being produce will be identically same to their parent cell. The DNA is exactly the same as the parent cell. There are five phases that it occurs in ? prophase, prometaphase, metaphase, anaphase and telophase. In prophase, the chromosomes become condensed, and discrete. The nucleoli disappear with each chromosome appears as two identical sister chromatids joined at the centromere.
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