Question

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Answer 1

a)Excretion

b)Heart beat

c)Vinegar

d)basic

2.a) 72/min

b)50-60lakh/mm

c)5000-6000/mm

d)350ml

3.a)

Answer 2

question 1)

1) excretion

2) cardiac cycle

3) citric acids

4) Magnesium dichloride

question 2)

a) heart beats - 72

b) RBC - 50-60 lakh /mm³

C) WBC - 5000-6000 /mm³

D) Blood donation - 350ml

question 3)

a) Arteries are blood vessels responsible for carrying oxygen-rich blood away from the heart to the body. Veins are blood vessels that carry blood low in oxygen from the body back to the heart for reoxygenation.

b) A substance, mostly liquid that donates a proton or accepts an electron pair in reactions. An acid increases the concentration of H+ ions. A base is a substance that releases hydroxide (OH-) ions in aqueous solution, donates electrons and accepts protons

Question 4)

a) Type O-negative blood does not have any antigens. It is called the "universal donor" type because it is compatible with any blood

b) Indicators are substances which gives a prominent sign to identify the presence of acids and alkali in the solution. Salt is produced from the reaction of acids and bases. So, salts are considered as neutral. For this reason, Indicators are not affected by salt as salt is the product of acid and base which is neutral.

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