introduction to metabolism | Biology basics|


Welcome to moomoomath and science. In this video I would like to talk about metabolism. You may have heard that you have a fast metabolism
or a slow metabolism. But what exactly is your metabolism? Your metabolism is the sum of all chemical
reactions within the cells of living things. Take a look at this summary of all of the
chemical reactions taking place in a human. It is a little confusing. The chemical reactions of metabolism are organized
into pathways in which one chemical is transformed through a series of steps into another chemical,
with the help of enzymes. An example of a pathway is cellular respiration
in which glucose and oxygen are transformed into carbon dioxide water and ATP which is
used for energy You can break metabolism down into three main
categories. The chemical reactions used for the conversion
of food to energy The conversion of food into building blocks
used to make other items like proteins The chemical reactions needed for the elimination
of waste Enzymes are crucial to metabolism Enzymes
help speed up chemical reactions. The molecules upon which enzymes may act are
called substrates and the enzyme converts the substrates into different molecules known
as products. Almost all chemical reactions in the cell
need enzymes in order to occur at rates fast enough to sustain life
There are over 5000 chemical reactions that occur in plants, animals, and microbes that
are controlled by enzymes. Most of the structures that make up animals,
plants and microbes are made from three basic classes of molecule: amino acids, carbohydrates,
and lipids. Many chemical reactions focus on making these
molecules during the construction of cells and tissues, or by breaking them down and
using them as a source of energy during digestion and cellular respiration. These chemicals can also be joined together
to make DNA and proteins. So there you go metabolism the sum of chemical
reactions that take place in living things. Thanks for watching and please subscribe and
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