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7. C
8. B
9. B
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Answer:
C) contributes to the mineral complex of bone
Explanation:
Sodium is a well known and common element. Sodium is essential for human body . Every human requires a small portion of sodium to enhance and maintain body fluid. Most of our sodium in take is mainly found in sodium chloride as salt.
Sodium is usually found in body fluids around cells and in the blood. Sodium assist in keeping body fluid in a normal balance . It also plays a major role in nerve impulse transmission and muscle function.
Sodium also help to maintain blood volume and blood pressure. It is very important in osmotic pressure of the cells. Major sources of sodium includes breads, sandwich, eggs, chicken, cheese, omelet etc.
Internal influences:
motivation
self esteem
External
social influence
physical performance
