background information: green group
TRANSCRIPT
© 2015 The Regents of the University of California. Image credit: Shutterstock; Getty Images.
Background Information: Green Group
A. Model what molecules could be in Julia’s cells just after she ran.
When you exercise, the cells of your body need to
be constantly supplied with glucose and oxygen. If
these molecules do not get into your cells, you will feel
tired. Glucose comes from food; glucose is broken
down from larger starch molecules. Oxygen comes
from air and is already small enough to travel into
the circulatory system and into the cells. The cells of
Julia’s body also need amino acids, which also come
from food; larger protein molecules are broken down
in the digestive system into amino acid molecules,
which can travel through the circulatory system and
into the cells.
B. Model what molecules could be in John’s cells since he didn’t eat breakfast.
When you don’t eat breakfast, you can feel very tired because your cells are not getting the molecules from
food that they need to function. Glucose and amino acids are molecules that come from food; glucose is broken
down from larger starch molecules, and amino acids are broken down from larger protein molecules.
C. Model what would happen in Levi’s body and cells just after he ate a meal of fish for dinner.
Fish is mostly protein. Protein molecules are large
molecules that are found in many foods like meats,
nuts, and beans. In the digestive system, protein gets
broken down into smaller molecules, amino acids,
which are small enough to get into the circulatory
system and then into the cells. Because fish doesn’t
have any starch, Levi would not have starch in his
digestive system, and he wouldn’t be getting glucose
(the smaller molecule that starch breaks down into)
into his circulatory system and cells. Because Levi is
breathing, he would be taking oxygen into his lungs,
and the oxygen molecules are already small enough to
travel into the circulatory system and cells.
© 2015 The Regents of the University of California. Image credit: Shutterstock.
D. Model what Lily’s cells would look like after she ate rice, potatoes, and no protein.
Rice and potatoes are made of starch, and starch is
broken down into glucose in your digestive system.
That glucose is then delivered to your cells. Protein
is a large molecule that is broken down into amino
acids in your digestive system. Amino acids are
then delivered to the cells by the circulatory system.
Because Lily is breathing, she would be taking oxygen
into her lungs, and the oxygen molecules are already
small enough to travel into the circulatory system and
cells.