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Transcript of METABOLISM
Series of processes through which living beings transform energy through chemical reactions.
-Growth of new cells.
-Generation of body temperature.
To break complex macromolecules into smaller components.
To form compounds and macromolecules (carb., prot., lip., nuc.acids) from molecules.
That release energy as a result of chemical processes
That require energy from the surroundings in order to be able to form compounds.
*energy in form of calories!!
1. Enzymes- they regulate the speed of the reactions. They attach to a specific substrate and form compounds, inhibiting other reactions as well.
2. Negative feedback: accumulation of a synthesized product that inhibits more enzyme work.
3. N.S., pancreas, pituitary & adrenal glands-->release hormones.
- blocks of cell construction.
- made from individual units called monomeres, in order to build combined units, called polymeres.
-during catabolism they are broken in 26 aminoacids.
-during anabolism they form hormones and enzymes.
-if they are not used immediately as energy, the glucose is converted into glucogen and stored in liver and muscle.
-when this reservoirs are saturated, glucose is turned into fat and stored in adipose tissue.
-broken into fatty acids and glicerol (oversimplified).
-store energy, as structural components of cellular membranes and important signal molecules.
-DNA and RNA are made of nitrogen bases, such as purines and pyrimidines, sugars and hydrogen bonds.
-When broken, they also provide energy and are a source of nitrogen.