Page 93 - The Miracle in the Immune System

Cells On Duty In The System 91

is because an army without communication would be
destroyed even before it launched its defence.
The existence of this molecule alone suffices to
prove the absurdity of the theory of evolution. This is
because the prerequisite of the system is the existence
of this molecule right from the outset. If helper T cells
failed to alert other cells with the help of this molecule,
the human body would surrender to viruses.

Killer T Cells
The killer T cells are the most efficient elements of
the defence system. In previous chapters, we have stud-
ied how viruses are inactivated by proteins called anti-
bodies. There are cases, however, when antibodies
cannot reach out to a virus which has invaded a cell. On
such occasions, killer T cells kill the sick cell which is in-
vaded by the virus.
A closer examination of how killer T cells kill sick
cells would reveal a great wisdom and an artistry in cre-
ation.
The killer T cells first have to distinguish between
normal cells and those in which invaders hide. They deal
with this problem with the help of the innate system
(MHC molecules) granted to them. When they locate
the invaded cell, they secrete a chemical substance. This
secretion sinks into the membrane of the cell forming a
hole by lining up sideways in close formation. Following
this, leaking starts in the cell which is full of pores, and
the cell dies.
Killer T cells store this chemical weapon in granular
form. This way, this chemical weapon is always kept