“For each body cell, there is a now”
The
human body is an astonishing hub of activities, with so many processes
concurrently taking place. Today, energy yielding processes are the focus.
Listing
the main energy-consuming and utilizing cellular processes in the body will
take but a few seconds; they include:
Ø Glycolysis:
the breakdown of glucose to pyruvate with the release of useable energy. A metabolic
process which occurs in almost all the body’s cells. Glycolysis yields 2 net
molecules of energy in form of Adenosine Triphosphate (ATP)
Ø KrebsCycle: also known as the Citric Acid Cycle, the Krebs cycle is the final common
pathway for the oxidation of carbohydrate, lipid and protein- in short, all
energy sources- since they can all be converted into acetyl-CoA, one of the
metabolic substrates of this cycle. 10 ATP molecules are formed per turn of the
citric acid cycle.
Ø Gluconeogenesis:
Process of energy production i.e glucose synthesis, from non-carbohydrate
sources such as amino acids, lactate and
glycerol. This process promotes weight loss when an individual consumes
low-carbohydrate food substances.
Ø Glycogenolysis:
Breakdown of glycogen into glucose in times of energy need. Results in ATP
generation.
Ø Ketogenesis:
Involves ketone body formation from fatty acids. These ketone bodies serve as
fuel for extrahepatic tissues (i.e. tissues outside the liver). Beta-oxidation
of fatty acids generate large uantities of ATP also.
Well,
that was a bit explanatory/ quite exhaustive, wasn’t it?
These
processes are important because they help in minute-to-minute, day-to-day
generation of energy for the body’s use.
They
teach us one vital lesson:
Ø The
fact that energy was generated for utilization yesterday does not guarantee
today’s energy availability. It still depends on your present nourishment. You cannot
keep depending on previous knowledge stores e.g. in your field, for your past
doesn’t settle your future!
Cells,
that make up our living bodies understand the principle of now, let us emulate
them as well, giving yield to ATP as needed, and replenishing our stores
actively.
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