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BIOS 224 chapter 21 HOMEWORK
- Place the following statements into the correct order to represent the se- quence of events
- All of the following processes can be activated by complement except .
- inflammation
- antibody production
- cytolysis
- opsonization
- None of these choices are correct.
- antibody production
- Which of the following is true regarding antigens?
- They have a molecular weight of around 1000 kDa.
- They have one antigenic determinant (epitope).
- They are considered normal by the immune system.
- They have multiple antigenic determinants (epitopes). 1 / 2
associated with the action of antigen-presenting cells.Phagocytosis of antigen Processed antigen fragments (epitopes) are displayed on the macrophage surface Lysosome fuses with phagosome Antigen is degraded Antigen and enzyme mix in phagolysosome –Answer 1) Phagocytosis of antigen 2) Lysosome fuses with phagosome 3) Antigen and enzyme mix in phagolysosome 4) Antigen is degraded 5) Processed antigen fragments (epitopes) are displayed on the macrophage sur- face
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- They are usually made of lipids.
- They have multiple antigenic determinants (epitopes).
- Which of the following is true regarding interferon?
- Interferon is produced as a specific response to a specific virus.
- Interferon is produced by one cell to warn a neighbor cell.
- Interferon is able to save the cell that makes it.
- Interferon kills all bacteria.
–Answer
- Interferon kills the cell that makes it.
- Interferon is produced by one cell to warn a neighbor cell.
- On the first exposure to an antigen, T helper cells
- become activated and increase in number.
- cause inflammation.
- cause skin lesions.
- cause shock.
- become activated and increase in number.
- When do skin lesions associated with type IV hypersensitivity reactions occur?
- 24 hours after first exposure
- 48-72 hours after first exposure
- 24 hours after second exposure
- 3 weeks after second exposure
- 24 hours after second exposure
- Which of the following is not necessary for IgE mediated hypersensitivity?
- B cells
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