Taken from [ the Wikipedia page on Anabolism/Catabolism ]:
Anabolism is the aspect of metabolism that is characterized by growth.
One way of categorizing metabolic processes, whether at the
cellular, organ or organism level is as
anabolic or catabolic.
Anabolic processes tend toward "building up" organs and tissues.
These processes produce growth and differentiation of cells and
increase in body size, a process that involves synthesis of complex
molecules. Examples of anabolic processes include growth and
mineralization of bone and
increase of muscle
Catabolic processes involve "breaking down" organs and tissues.
These processes involve "dismantling" of structural proteins for recycling for
other purposes. Catabolic processes occur during starvation, stress and illness. Examples of
catabolic processes include breakdown of muscle protein in order to
use amino acids
as substrates for
gluconeogenesis (much like burning furniture
in your house as fuel because you are out of firewood), and
breakdown of fat in adipose to fatty acids for fuel.
Because it is counterproductive to have anabolic and catabolic
processes occurring in cells simultaneously, there are many signals
that switch on anabolic processes while switching off catabolic
processes and vice versa. Most of the known signals are hormones of various types.
Endocrinologists have traditionally
classified many of the hormones as anabolic or catabolic.
- Classic anabolic hormones include
- Classic catabolic hormones include
- Newer hormones associated with the balance of the catabolic and
anabolic states include
Note that adrenaline is catabolic — this perfectly explains why crabby and irritable people are often portrayed as having a short and skinny physique. The lesson? Stop getting annoyed by all those little things if you want to