Prentice Hall Biology (California)
Prentice Hall Biology (California)
1st Edition
Kenneth R. Miller, Levine
ISBN: 9780132013529
Textbook solutions

All Solutions

Section 40.3: Immune System Disorders

Exercise 1
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**Autoimmunity** or **autoimmune disease** is a type of inflammatory disorder in which the immune response of an individual specifically the antibodies fight the body’ own healthy cells, tissues, or organs. A disease called **Lupus** is a type of autoimmune disease in which the immune system attacks the own tissues and organs of your body, causing inflammation in the different body systems.
Exercise 2
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HIV is transmitted through the exchange of bodily fluids such as blood, semen, vaginal secretion, or breast milk. The infection is transmitted through direct sexual intercourse with an infected person, shared needles/syringes contaminated by the blood of the infected person, contact with blood/blood product of the infected person, or from an infected mother to child during pregnancy, birth, or breastfeeding.
Exercise 3
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There are two main types of immune system disorders. These disorders are the autoimmune disease and the immunodeficiency disease.

In an autoimmune disease, the immune system attacks itself. On the contrary, the immunodeficiency disease is characterized by the immune system’s failure to function normally.

Exercise 4
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The **HIV virus** negatively affects helper T cells. It attacks the helper T cells, which weakens the body’s immune system. The virus binds to receptors on the helper T cells and enters them. It uses its host’s machinery to make DNA copies of its RNA through the process of reverse transcription. Some of the DNA copies also get incorporated into the host cell’s DNA, thus producing more viral proteins when replicated. Because the immune system is weakened, the body will become more susceptible to other diseases.
Exercise 5
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Since asthma is a constantly recurring or chronic respiratory disease, doctors ask several questions in order to determine the possible trigger of the attacks. Knowing when and where the previous attack took place can give helpful information on the substances which may have caused the problem. In this way, doctors can better assist the patient on what factors he or she must avoid.
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