I was in a bus this
morning, happy with myself for having bagging such a ride. You see, this bus was
going to transport me from almost literally my doorstep to where I needed to be
exactly; and this completed exemplified and simplified hormonal activity in my
ever-active mind. Two exact straight lines were being joined.
A hormone (a human) is
a chemical substance (is a mechanical being), formed in one organ or part of
the body (who lives in his/her house) and is transported by blood (transported
by land, air or water) to its site of action (to where he/she needs to perform
necessary actions).
The word hormone
originates from the Greek word hormao, which is translated to mean ‘to
rouse or set in motion’. Any need then to wonder on the amazing
correlations between the human movement and hormonal transport?
The similarities
between hormone transport and human movement include, but aren’t restricted to:
1.
SITES OF FORMATION AND ACTIVITY ARE
DIVERGENT: A hormone is formed in a different place and it acts at a different
site. My house and school are two different places, yet I go to school everyday
2.
TRANSPORTED: Both the hormone and the
human need to be transported for their activities to take place
3.
ENERGY USAGE: Production of hormones
require the usage of energy substrates e.g.:
(i)
Amino
acids are used up in the formation of protein hormones
and hormones derived from tyrosine (e.g. pancreatic, anterior and posterior
pituitary, cathecolamines, thyroid hormones)
(ii)
Cholesterol
(very
important in formation of cell membrane) is used in the formation of steroid
hormones (e.g. adrenal cortex, gonadal,
placental hormones)
The
human is a fuel-using mechanical being as well. He/she makes use of energy in
the form of ATP (Adenosine Triphosphate)
4.
CONTROL IS BY FEEDBACK: Most hormones
are known to be regulated by negative feedback to prevent them from being
overtly expressive, while a few are controlled by positive feedback- an example
of which is the LH surge.
Can
human motion be controlled by feedback reactions? That’s an open question.
Comments are welcome.
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