Tuesday, June 8, 2010

Extracellular Fluids?

What Types of Substances Are Found in the Intracellular and
Extracellular Fluids?
In our body fluids we would find small dissolved substances such as ions,
amino acids, and the carbohydrate glucose, as well as larger proteins. The
major ions (or electrolytes) would include potassium (K+), sodium
(Na+), chloride (Cl−), calcium (Ca2+), magnesium (Mg2+), phosphate
(PO43−), and bicarbonate (HCO3−). As demonstrated in Figure 2.2, all of
these and other substances will be found in both the intracellular and
extracellular fluids. However, the concentration of substances dissolved
in either fluid varies and the plasma membrane is bestowed with the
awesome responsibility of functioning as a barrier between the two
mediums.

Sunday, June 6, 2010

Free radicals are molecules

The presence of free radicals in our body is not necessarily a disease and
seems to be unavoidable. That's because free radicals are normally pro-
duced when we breakdown carbohydrates, protein, and fat for energy.
Furthermore, certain immune processes purposely generate free-radical
substances to attack foreign entities or debris in our body. However, free
radicals can certainly lead to disease if their presence becomes too great
and they are left to their own devices. This tends to happen when we
allow free radicals access to our body via the foods we eat and the
substances we breathe. Cigarette smoke is loaded with free-radical sub-
stances, probably more than one hundred different kinds.
   Free radicals are molecules that can take electrons from other
   molecules thereby causing damage.
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Wednesday, May 19, 2010

Benefits of exercising

Benefits of exercising
  • Boost to your emotional well being – Even light exercise can help boost your
    mood. Also, more intense exercise can stimulate the release of mood elevating
    compounds called endorphins.
  • Reduce risk of heart disease – If you are overweight or obese, you are more
    prone to heart disease, as you have a higher risk of cardiovascular disease. You
    can improve your cardiovascular function if you partake in exercise.
  • Improvement to memory – If you exercise more regularly, you move blood
    and oxygen to all your body's organs, including the brain, which is great for
    revitalising your mind.
  • Reduced risk of Diabetes – Physically active people are less likely to develop
    Diabetes, as exercise increases the body's ability to use sugar for energy and
    thereby decreases the need for insulin.
  • Other benefits include: - Improved sleep pattern, increased strength,
    improved energy level, pain relief, longevity and increased bone density.