CBSE Class 11 Biology Body Fluids and Circulation MCQs

Question : Blood pressure is measured by

a) sphygmomanometer

b) electrocardiogram

c) stethoscope

d) None of these

Answer : A

Question : Coronary artery disease (CAD) is often referred to as

a) Atherosclerosis

b) Heart failure

c) Cardiac arrest

d) None of these

Answer : A

Question : Which one of the following is a correct matching pair?

a) Lubb - Sharp closure of AV valves at the beginning of ventricular systole

b) Dup - Sudden opening of semilunar valves at the beginning of ventricular diastole.

c) Pulsation of the radial artery valves in the blood vessels

d) Purkinje fibers - Initiation of the heart beat

Answer : A

Question : Heart is covered by

a) Pericardium

b) Pleural membrane

c) Visceral membrane

d) None of these

Answer : A

Question : Pacemaker of heart is

a) SA node

b) AV node

c) Bundle of His

d) Purkinje fibres

Answer : A

Question : Uricotelism is found in

a) Fishes and fresh water protozoans

b) Birds, reptiles and insects

c) Mammals and birds

d) Frogs and toads

Answer : A

Question : Haemoglobin is having maximum affinity with

a) CO

b) O₂

c) NH₃

d) None of these

Answer : A

Question : An adult human with average health has systolic and diastolic pressures as

a) 120 mm Hg and 80 mm Hg

b) 50 mm Hg and 80 mm Hg

c) 70 mm Hg and 120 mm Hg

d) 80mm Hg and 80 mm Hg

Answer : A

Question : Blood group AB has

a) no antibody

b) no antigen

c) neither antigen nor antibody

d) both antigen and antibody

Answer : A

Question : With reference to the blood in a normal person, which one of the following statements is correct?

a) The blood has more platelets than WBC.

b) White blood cells (WBC) are made by lymph nodes only

c) Blood cells constitute about 70 percent of the total volume of the blood

d) Compared to arteries, veins are less numerous and hold less of the body’s blood at any given time.

Answer : A

Question : Thickening of arteries due to cholesterol deposition is

a) arteriosclerosis

b) blood pressure

c) rheumatic heart

d) cardiac arrest

Answer : A

Question : Hepatic portal system carries

a) Deoxygenated blood from intestine to live

b) Oxygenated blood from liver to intestine

c) Oxygenated blood from intestine to liver

d) Deoxygenated blood from liver to intestine

Answer : A

Question : Chordae tendinae are found in

a) ventricles of heart

b) atria of heart

c) joints of legs

d) ventricles of brain

Answer : A

Question : The pattern of contraction and relaxation of the heart is referred to as

a) cardiac cycle

b) arterial flow

c) blood pressure

d) blood flow

Answer : A

Question : The affinity of CO with Hb is more than oxygen by

a) 2000 times

b) 20 times

c) Both

d) None of these

Answer : A

Question : Life span of human RBCs is

a) 120 days

b) 9 days

c) 20 days

d) 90 days

Answer : 120 days

Question : Erythroblastosis foetalis occurs when

a) Mother is Rh negative and father is Rh positive

b) Father is Rh negative and mother is Rh positive

c) Both are Rh positive

Answer : A

Question : Which of the following set of animals has an incomplete double circulation system?

a) Toad and lizard

b) Shark and whale

c) Frog and crocodile

d) Lizard and pigeon

Answer : A

Question : Which of the following factors is known as Christmas factor?

a) Factor IX

b) Factor XII

c) Factor VIII

d) Factor IV

Answer : A

Question :  In veins, values are present to check backward flow to blood flowing at

a) low pressure

b) high pressure

c) atmospheric pressure

d) None of these

Answer : A