Biology - Mock Test 65

Question 641

Systematic circulation of oxygenated blood starts from?

A) Right atrium B) Left atrium C) Left ventricle D) Right ventricle

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Question 642

Sympathetic nervous system?

A) Decreases heart beat B) Increases heart beat C) Not related to heart beat D) Controls heart beat

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Question 643

SA node is located?

A) Upper lateral wall of left atrium B) Lower lateral wall of left atrium C) Upper lateral wall of right atrium D) Lower lateral wall of right atrium

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Question 644

Right atrium receives blood from?

A) Sinus system B) Pulmonary veins C) Inferior vena cava D) Superior and inferior venae cavae

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Question 645

Ridges present in the ventricles are?

A) Columnae Carneae B) Papillary muscles C) Chordae tendineae D) Musculi pectinati

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Question 646

Rate of heart beat is reduced by?

A) Acetylcholine B) Adrenaline C) Calcitonin D) Thyroxine

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Question 647

Purkinje fibres arise from?

A) Apex of ventricles B) Middle of ventricles C) Anterior part of auricles D) Posterior part of auricles

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Question 648

Purkinje fibres are connected with impulse conducting system of?

A) Heart B) Brain C) Skin D) Kidney nephrons

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Question 649

Pulse pressure is?

A) Diastolic pressure B) Systolic pressure C) Difference between B and A D) Pressure in great veins

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Question 650

Pulmonary vein carries blood?

A) Deoxygenated B) Oxygenated C) Mixed D) Free from wastes

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