BY 108 Chapter Notes - Chapter 25: Complement Membrane Attack Complex, Stratum Spinosum, Stratum Corneum
Document Summary
Oil/sweat glands >> low ph on surface >> many microorganisms killed. Stratum corneum - outer skin layer lyxozyme - enzyme in sweat that digests bacterial cell walls. Stratum basale - innermost skin layer, produces new skin cells. Stratum spinosum - broad layer in middle of epidermis. Dermis - skin layer below epidermis, gives structural support. Other surfaces leading to outside - digestive tract, respiratory tract, inread invented by teads urogenital tract. Mucus traps microorganisms in bronchi, cilia sweeps mucus towards glottis to stomach cellular counterattack - 2nd line of defense. Macrophages - big eaters identity of pathogen doesn"t matter lymphatic system = central location for distribution of immune system cells ingests microbes through phagocytosis. Uses oxygen-free radicals to destroy microbes inread invented by teads. Can release chemicals (similar to bleach) to kill all cells in surroundings. Natural killer cells - destroys cells already infected by the microbe. Drills hole into plasma membrane complement system - in vertebrates, contains 20 proteins.
