Man does not live by food alone. Water is vital to human health and fitness. Although it is not a nutrient as are carbohydrates, fats, proteins, vitamins and minerals. It is infact a key nutrient as no life is possible without it. Whereas we can do for weeks without food, we cannot live without water longer than a couple of days. Water approximates 60% of the body weight of human adults. The total amount of water in a man weighing 70 kilograms is approximately a little over 40 litres. It is an excellent solvent-more substances are soluble in water than any other liquid known so far. This makes an ideal constituent of the body fluids which sustain life-supporting chemical reactions. It dissolves diverse metabolic wastes and helps drain them out of the body. The no less important role of water is to distribute /dissipate the body heat efficiently, thereby regulating the body temperature. Water accomplishes this role because it has thermal conductivity ensuring rapid heat from one part to the other. Above all, water has a high specific heat to raise the temperature of water and likewise much heat must be lost to lower it’s temperature.
Drinking a lot of water is an inexpensive way to stay healthy. Even excess of water is harmless.Water therapy of drinking a litre or so the first thing in the morning is kidney-friendly. The water regulation in the body is affected by the hypothalamus in two ways i.e. (i) by creating the
sensation of thirst which makes us drink water and (ii) by controlling the excretion of water and urine. If water regulation fails, medical emergency ensues will be created.
on the basis of your understanding answer the following questions:
a) water is ritual to human health and fitness because
i)man does not live by food alone
ii)we cannot survive for than a couple of days without it
iii) it is an excellent solvent
iv) it controls thirst and excretion of water as urine
b) water is called a key nutrient because
i) hated is also different products of digestion
ii) no life is possible without it
iii) it carries products to rest of the body
iv) it raises temperature of the body
b) water is an ideal constituent of the body fluid because
i) it is an excellent solvent
ii) it dissolves metabolic waste
iii) it drains waste out of the body
iv) it regulates excretion of urine
Answers
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Answer:
(i) man does not live by food alone.
(ii) no life is possible without it.
(i) it is an excellent solvent.
(iv) it has high thermal conductivity.
(ii) control.
Explanation:
Step 1: The health and fitness of humans depend on water. Nevertheless, unlike carbs, lipids, proteins, vitamins, and minerals, it is not a nutrient per se. In fact, it is a crucial vitamin since life cannot exist without it. We can go for weeks without food, but we can only go for a few days without water.
Step 2: Lubricate and cushion joints. Protect your spinal cord and other sensitive tissues. Get rid of wastes through urination, perspiration, and bowel movements.
Step 3: (a) Water is vital to human health and fitness because:
(i) man does not live by food alone.
(b) Water is called a key nutrient because:
(ii) no life is possible without it.
(c) Water is an ideal constituent of the body fluids because:
(i) it is an excellent solvent.
(d) Water regulates body temperature efficiently as:
(iv) it has high thermal conductivity.
(e) What does the author means when he uses the word ‘regulation’ in the last para?
(ii) control.
Thus, answers to the given questions is as above.
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