Cytotoxic T cells
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Question
Transcribed Image Text:**Question:**
With a secondary exposure to an antigen, if memory cells are produced, the response will include:
- ○ a longer reaction time with more antibody produced
- ○ a shorter reaction time with more antibody produced
- ○ a longer reaction time with less antibody produced
- ○ a shorter reaction time with the same amount of antibody produced
**Explanation:**
When the immune system is exposed to an antigen for the second time, memory cells recognize it. This usually results in a faster and more efficient immune response compared to the initial exposure. This secondary response often features a shorter reaction time and an increased production of antibodies, enhancing the body's defense mechanism against the antigen.
Transcribed Image Text:**Cytotoxic T Cells**
- Lack specificity for a target cell
- Stimulate B cell proliferation
- Secrete interleukin-2 to stimulate B and T cells
- Secrete granzymes and perforins that damage target cells
**Explanation:** This list presents four statements regarding the function and characteristics of cytotoxic T cells. Cytotoxic T cells are a type of immune cell known for their ability to directly kill infected or cancerous cells. Key functions include secreting proteins like granzymes and perforins that lead to the destruction of target cells.
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