All of the following are true of antigen-presenting cells (APCS) EXCEPT:APCs process antigens from phagocytized microbes and present themto lymphocytesThey include macrophages and dendritic cellsThey play a key role in eliciting (triggering) specific immune responsesAPCS by themselves can remember prior exposure to specific microbialantigens and respond specifically to themThey interact directly with lymphocytes The following events result in the destruction of a virus-infected body cell. Place them inthe correct order and indicate which one would happen third.(Note: The third in sequence of the five answers listed, not necessarily the step that wasnumbered "3" in the textbook diagram)O Cytotoxic T Cell (TC) releases perforinCytotoxic T Cell (TC) binds to infected cellInfected cell lysesInfected cell displays virus-directed antigens on its surfaceO Perforin damages infected cell membrane

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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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All of the following are true of antigen-presenting cells (APCS) EXCEPT:
APCs process antigens from phagocytized microbes and present them
to lymphocytes
They include macrophages and dendritic cells
They play a key role in eliciting (triggering) specific immune responses
APCS by themselves can remember prior exposure to specific microbial
antigens and respond specifically to them
They interact directly with lymphocytes

The following events result in the destruction of a virus-infected body cell. Place them in
the correct order and indicate which one would happen third.
(Note: The third in sequence of the five answers listed, not necessarily the step that was
numbered "3" in the textbook diagram)
O Cytotoxic T Cell (TC) releases perforin
Cytotoxic T Cell (TC) binds to infected cell
Infected cell lyses
Infected cell displays virus-directed antigens on its surface
O Perforin damages infected cell membrane

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Antigen-presenting cells (APCs) are immune cells that play a crucial role in triggering and coordinating specific immune responses. They include macrophages, dendritic cells, and B cells. APCs process antigens from phagocytized microbes and present them to lymphocytes, which can then be activated to produce specific antibodies or target infected cells

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