QUESTION: In order to maintain body fluid
balance, approximately __________ milliliters of
fluid must be taken into the body during each 24
hour period of time.
Solution to Frame 42
A person normally loses approximately 2,500
ANSWER: In order to maintain
milliliters of fluid each day. Most people are
body fluid balance,
unaware that these fluid losses are occurring
approximately 2,500 milliliters of
because the losses are replaced as they occur.
fluid must be taken into the body
For example, a person drinks a 240 ml soft drink;
during each 24-hour period of
then he might go directly to the restroom (latrine)
and urinate 240 milliliters. How often have you had
a spot of tea only to find yourself needing to go to
the restroom several minutes later?
Abnormal losses of fluid are not subtle. Everyone
is aware when abnormal fluid losses occur.
Obviously, the most obvious fluid losses occur
when a person suffers from severe vomiting and
diarrhea. However, more subtle abnormal fluid
losses can occur.
Vomiting, a very noticeable way of losing fluids,
accounts for more fluid loss than one would expect.
That is, a person who experiences severe vomiting
not only loses those fluids he has taken orally, he
also loses fluids (like gastric juices) which are
secreted into the stomach. Gastric juices are rich
in electrolytes. For example, a liter of gastric juice
contains approximately 50 mEq of bicarbonate.