Explain why it is difficult for pathogens to get to a part of the body in which they can cause disease. The body has a natural system of barriers to keep pathogens out. The skin, breathing passage, the mouth and stomach trap and kill most pathogens. What is the relationship between antigens and antibodies? B cells produce antibodies in response to specific antigens on pathogens; antibodies attach to antigens and prevent the pathogens from attacking cells. Describe two ways in which active immunity is acquired. What do they have in common? Active immunity is acquired when a person contracts a disease or receives a vaccination. In both, a person’s immune system produces antibodies in response to a pathogen. How does diabetes harm the body? Diabetes is caused by insufficient insulin or the inability of ells to use insulin. This prevents body cells from properly absorbing and using glucose. Identify two factors that can make a person likely to develop cancer. Inherited factors and exposure to environmental carcinogens can increase the likelihood of cancer. Thinking Critically Can you catch a cold by sitting in a chilly draft? Explain. You can’t catch a cold from a chilly draft alone. If there is a virus in the draft from someone sneezing, then yes, you would possibly catch a cold from the virus. Identify each structure labeled below and its role in the immune response. A) B cell, produces antibodies B) Antibody, recognizes and destroys pathogens C) antigen, structure on pathogen recognized by an antibody. (19) Why is the immune system successful in fighting most pathogens but is unsuccessful in fighting HIV?
Explain why it is difficult for pathogens to get to a part of the body in which they can cause disease. The body has a natural system of barriers to keep pathogens out. The skin, breathing passage, the mouth and stomach trap and kill most pathogens. What is the relationship between antigens and antibodies? B cells produce antibodies in response to specific antigens on pathogens; antibodies attach to antigens and prevent the pathogens from attacking cells. Describe two ways in which active immunity is acquired. What do they have in common? Active immunity is acquired when a person contracts a disease or receives a vaccination. In both, a person’s immune system produces antibodies in response to a pathogen. How does diabetes harm the body? Diabetes is caused by insufficient insulin or the inability of ells to use insulin. This prevents body cells from properly absorbing and using glucose. Identify two factors that can make a person likely to develop cancer. Inherited factors and exposure to environmental carcinogens can increase the likelihood of cancer. Thinking Critically Can you catch a cold by sitting in a chilly draft? Explain. You can’t catch a cold from a chilly draft alone. If there is a virus in the draft from someone sneezing, then yes, you would possibly catch a cold from the virus. Identify each structure labeled below and its role in the immune response. A) B cell, produces antibodies B) Antibody, recognizes and destroys pathogens C) antigen, structure on pathogen recognized by an antibody. (19) Why is the immune system successful in fighting most pathogens but is unsuccessful in fighting HIV?
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