Biology : Body Fluids and Circulations

The instrument used for measuring blood pressure is

• electrocardiograph

• X-rays

• sphygmomanometer

• electroencephalograph

Heart beats originates from

• pace maker

• cardiac muscles

• left atrium

• right ventricle

Pernicious anaemia is caused due to

• absence of vitamin-K

• lack of Vitamin - B₁₂

• lack of Vitamin - C

• presence of intrinsic factor

How many molecules of oxygen can bind to a molecule of haemoglobin?

• One

• Two

• Three

• Four

Which of following organ can be called a sort of "blood bank" ?

• Heart

• Spleen

• Liver

• Lungs

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

The vitamin which is essential for blood clotting is

• vitamin-A

• vitamin-B

• vitamin-C

• vitamin-K

Pace-maker is

• AV node

• SA node

• Bundle of His

• Purkinje fibres

In blood, CO₂ is transported majorly as

• sodium carbonate

• carboxyhaemoglobin

• bicarbonate

• CO₂ as such

Vitamin essential for proper functioning of liver and clotting of blood is

• Vitamin- K

• Vitamin- A

• Vitamin- E

• Vitamin- B₁₂