Page 46 - The Cell in 40 Topics

The Cell in 40 Topics

Figure 34.
Thanks to adrenaline, the human body gains
extra strength and resistance at times of
stress.

contract more powerfully (Figure 35).
Adrenaline molecules arriving at the
Figure 35.
liver, command cells there to release
more sugar into the blood. The level of
sugar in the bloodstream thus rises, and
the muscles obtain the extra fuel they re-
quire (Figure 36).
This very small adrenaline molecule
knows very well what it has to do, and
when, and never places the human body into a state of alarm so long as it
perceives no need. In addition, it never forgets what kind of command it
must issue to the different cells it encounters. Moreover, this all goes to
show that this hormone is very well acquainted with the cells and organs
and their functions. Nor does it ever make a mistake over when the state of
alarm needs to come to an end, or the body might suffer irreparable dam-
age due to overstimulation.
However, this tiny molecule functions in apparent knowledge of this

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