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Lesson 1 Continued

Lesson 1 Continued. The Immune Response. Nonspecific Resistance – Include both physical and chemical barriers. There are (4) of them!!

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Lesson 1 Continued

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  1. Lesson 1 Continued

  2. The Immune Response • Nonspecific Resistance – Include both physical and chemical barriers. There are (4) of them!! • Physical Barriers – 1st line of defense includes your skin. Mucous membranes which is the soft skin-like linings of many parts of the body. It is found in your mouth, nose, and bronchial tubes. • Chemical Barriers – Enzymes in tears and saliva help destroy bacteria. Acidic digestive juices of the stomach are also chemical barriers. • Body Cells – Certain types of white blood cells called phagocytes travel through the blood to destroy pathogens.

  3. The Process of Phagocytes • When phagocytes engulf and destroy pathogens, it is called PHAGOCYTOSIS. • The CHIEF type of phagocyte involved in the PHAGOCYTOSIS PROCESS are called Neutrophils.

  4. 4. Inflammatory Response – If pathogens happen to break through the body’s outermost barriers, your body goes into a RED ALERT stage known as the Inflammatory Response!!!! • Chemical mediators are released that cause the blood vessels to dilate and allow increased blood flow. This permits phagocytes to leave the blood and enter the body tissues. • The process continues until pathogens are destroyed. Once they are destroyed, tissues can be repaired. • Symptoms of this include – heat, redness and swelling, which result to an increased blood flow.

  5. The Immune Response • Specific Resistance – The general response of your nonspecific defenses are not always enough to protect your body from disease. • The adaptive immune system mounts specific attacks against particular types of pathogens. When this happens, another body defense goes into action – Lymphocytes.

  6. Lymphocytes • These are type of white blood cell that fights pathogens. They travel through your body along two networks of vessels. • Blood Vessels • Lymph Vessels – which are a part of your Lymphatic System. There are (2) main types of lymphocytes.

  7. Take out your book and turn to PAGE 626 and explain each: • B-Cells – • T-Cells – How does one care for their Immune Response?

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