Before you begin a chapter, it is important to have a broad overview of what it covers. Each chapter has an outline that permits you to see at a glance how the chapter is organized and what major topics are included.
in th^Body1*1 g
Almost all of the figures have been redone in this edition, ranging from a complete redrawing of the figure to simple labeling changes. A realistic three-dimensional perspective has been added to many of the figures for greater clarity and understanding of the concept.
The binding between helper T-cell receptor and antigen bound to class II MHC proteins on an APC is the essential antigen-- " ** t .. . vation However, this in T-cell activation. In occur between other on the surfaces of the and these provide a i . ______
tivation (Figure 20-1
Finally, the antig 'C to the
T ceH, along with th e APC to secrete large amount rleukin 1
(IL-1) and tumor net ich act as paracrine agents on t ;U to pri>
vide yet another imp vation.
vision of a ccstimulu hing antigenic plasma-me: sec of IL-1 and TNF (Fig
The activated hel rete_
ious cytokines that h cts on the helper T cell and par 'nt B cells and any nearby cyto , and still other cell types; we w es in later
of the APC and the helper T cell; a
Vander et al.: Human Physiology: The Mechanism of Body
© The McGraw-Hill Companies, 2001
Was this article helpful?
This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.