Multiple Choice Questions

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In blood, CO2 is transported majorly as

  • sodium carbonate

  • carboxyhaemoglobin

  • bicarbonate

  • CO2 as such


C.

bicarbonate

In dissolved state 7% of CO2 gets dissolved in the blood plasma and about 0.3 mL of CO2 is transported per 100 mL of blood in plasma.

In the form of bicarbonate about 70% of CO2 is received by blood from tissues, enters the RBCs where it reacts with water to form carbonic acid (H2CO3).

As carbaminohaemoglobin about 23% of CO2 is transported in combination with haemoglobin and plasma proteins. CO2 reacts with NH2 (amine radicals) of Hb to form an unstable compound cabamino- haemoglobin (Hb.CO2).

Sodium bicarbonate acts as a buffer of blood.


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Rate of heart beat is determined by

  • Purkinje Fibres

  • Papillary muscles

  • SA-node

  • AV-node


The blood group with antibody-a and antibody-b is

  • B

  • A

  • O

  • AB


A man of 'A' blood group marries a woman of 'AB' blood group. Which type of progeny would indicate that man is heterozygous?

  • O

  • B

  • A

  • AB


Hamburger shift is also known as

  • bicarbonate shift

  • chloride shift

  • potassium shift

  • All of the above


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Heparin is synthesized in

  • liver

  • kidney

  • saliva

  • pancreas


The vitamin which is essential for blood clotting is

  • Vitamin- A

  • Vitamin- B

  • Vitamin- C

  • Vitamin- K


Rh factor is present in

  • all vertebrates

  • all mammals

  • all reptiles

  • man and rhesus monkey only


'Bundle of His' are
  • nervous tissue supplied to ventricles

  • nervous tissue supplied to heart

  • muscular tissue supplied to ventricle

  • muscular tissue supplied to heart


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The leucocytes contain which of the following in large quantity?

  • Basophils

  • Neutrophils

  • Eosinophils

  • Monocytes


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