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1. Heart beats d. 72

Explanation: Heart rate is the number of times your heart beats per minute. If you count 12 beats in the span of 10 seconds, multiply 12 X 6 = 72.

This means your Heart Rate or pulse, is 72 (or 72 beats per minute). A Resting Heart Rate anywhere in the range of 60 - 90 is considered in the normal range. Your Heart Rate will fluctuate a lot depending on such factors as your activity level and stress level.

2. RBC e. 50-60 lakh/mm

Explanation: The RBC is a count of the number of red blood cells per cubic millimetre of blood. Their normal level is required to carry oxygen from the lungs to body tissues and to transfer carbon dioxide from the tissues to the lungs.

3. WBC f. 5000-6000 per mm

Explanation: Healthy blood contains a certain percentage of white blood cells (WBCs, leukocytes or leucocytes) which, as part of the body’s immune system, help the body fight infection. A white blood cell (WBC) count measures the amount of white blood cells in a sample of a person’s blood. The number of white blood cells in the body differs between individuals or at different ages in their lives. The normal range for a white blood cell count in a healthy adult is between 4,000 and 11,000 WBCs per micro-litre (μl or mcL) or cubic millimetre (mm3) of blood, though this may differ between males and females, and healthy children and young people usually have more.

4. Blood donation a. 350 ml

Explanation: Every adult human being (male or female) has 5 to 6 liters of blood. Any person between 18 and 60 years, weighing 45 kg or more can safely donate one unit of blood, that is, 350 ml once every three months. After donation, the blood volume can be recovered within 24 hours and the hemoglobin count returns to normal within two weeks. No special diet or rest is required after donating a unit of blood.

5. Normal body Temperature c. 37° C

Explanation: Normal body temperature varies by person, age, activity, and time of day. The average normal body temperature is generally accepted as 98.6°F (37°C). Some studies have shown that the "normal" body temperature can have a wide range, from 97°F (36.1°C) to 99°F (37.2°C).A temperature over 100.4°F (38°C) most often means you have a fever caused by an infection or illness. Body temperature normally changes throughout the day.

6. pH of oxygenated blood b. 7.4

Explanation: pH is a logarithmic scale used to specify the acidity or basicity of an aqueous solution. Blood pH is regulated to stay within the narrow range of 7.35 to 7.45, making it slightly basic. Blood that has a pH below 7.35 is too acidic, whereas blood pH above 7.45 is too basic. The oxygenated blood is deep red colour, salty in taste and its pH is 7.4.

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