Biology - Mock Test 109

Question 1081

Which one of the followings refers to blood cancer characterized by uncontrolled proliferation of abnormal/immature white blood cells in the bone marrow?

A) Hypertension B) Atherosclerosis C) Leukemia D) Pulmonary embolism

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Question 1082

Atrioventricular valves are supported by strands of connective tissue called ______?

A) endocardium B) myocardium C) chordae tendineae D) cardiac fibers

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Question 1083

In higher vertebrates, SA node helps in ?

A) Opening of tricuspid valve B) Initiation of heart beat C) Conduction of blood D) Opening of bicuspid valve

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Question 1084

In ECG, P-R interval corresponds to ?

A) Time interval between onset of ventricular contraction B) Time delay in A-V node C) S-A nodal conduction time D) Increased ventricular contraction

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Question 1085

Oxygenated blood occurs in ?

A) Pulmonary artery B) Right atrium C) Right ventricle D) Pulmonary vein

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Question 1086

In developing embryo RBCs are formed in ?

A) Lymph node B) Bone marrow C) Liver D) Spleen

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Question 1087

In a standard ECG which one of the following alphabets is the correct representation of the respectively activity of the human heart?

A) P-depolarisation of atria B) R-repolarisation of ventricles C) S-start of systole D) T-end of diastole

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Question 1088

In a cardiac output of 5250 ml/minute, with 75 heart beats per minute, the stroke volume is ?

A) 80 ml B) 70 ml C) 60 ml D) 55 ml

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Question 1089

Hepatic portal system connects ?

A) Liver to digestive system B) Kidney to liver C) Digestive system to liver D) Liver to kidneys

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Question 1090

Heparin is produced by ?

A) Liver cells B) Plasma cells C) Blood cells D) Spleen cells

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