Page 53 - The Cell in 40 Topics

Harun Yahya - Adnan Oktar

The moment that blood pressure (or the level of sodium in the blood-
stream) falls, certain cells in the kidneys take notice. These cells that sound
the alarm are the juxtaglomerular (JGA) cells, which secrete a special sub-
7
stance called rennin (Figure 40).
The way that cells are able to determine that blood pressure or sodium
levels have fallen is a miracle in itself. More important, however, is the
cells' secretion of rennin, because that is the first stage in a long chain of
production.
In blood plasma, there is a protein that normally has no effect as it cir-
culates around in the bloodstream. This is angiotensinogen, which is pro-

duced in the liver. Here begins the first stage of an utterly amazing plan.
That is because angiotensinogen and rennin—which serve no purpose on
their own and by themselves—have been specially designed to combine
with one another, in the same way that the components of a machine are
often designed so as to be able to be linked to one another (Figure 41).
Figure 40.
The moment that blood pressure falls (or when the level of sodium in the blood
decreases), cells in the kidneys known as juxtaglomerular cells (JGA) enter a
state of alarm and secrete a special substance known as rennin.

51