Sometimes, the dark spots on
the marshmallow can fall off
of the marshmallow. what
does this mean for the
system?
a. the system must include the pieces
that fell when determining the mass before
and after
b. the system does not need to include
the pieces that fell when determining the
mass before and after.
c. only the marshmallow must be
included when determining the mass
before and after.

After frida stops exercising, she continues to breathe heavily. what is most likely occurring in her body? heavy breathing during exercise has produced an oxygen surplus in her muscles. this oxygen is being transported to her lungs. this is a result of aerobic respiration. heavy breathing during exercise has produced a carbon dioxide surplus in her muscles. lactate is being transported to her liver. this is a result of aerobic respiration. strenuous exercise has caused her body to be in carbon dioxide debt, and she is breathing hard while lactate is transported to the liver. this is a result of anaerobic respiration. strenuous exercise has caused her body to be in oxygen debt, and she is breathing hard while lactate is transported to the liver. this is a result of anaerobic respiration.