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Which wave of ECG represents repolarization?

P wave

QRS complex

ST wave

T wave

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Explanation

NCERT, P -286, Para 5

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The passage of blood from left atrium to body is

left atrium – left ventricle – Aorta – Body

left atrium – right ventricle – Aorta – Body

left atrium – left ventricle – Pulmonary Artery – Body

left atrium – left ventricle – Pulmonary Veins – Body

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Explanation

NCERT, P -286, Double Circulation

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The passage of blood from right atrium to body is

right atrium–right ventricle–pulmonary vein–body

right atrium–right ventricle–pulmonary artery–lung

right atrium– left ventricle–pulmonary vein–body

right atrium–left ventricle–pulmonary artery–lung

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Explanation

NCERT, P -286, Double Circulation

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The pathway of single circulation is

Heart – body – gills – Heart

Heart – gills – body – Heart

Heart – body –gills – body – heart

body – heart – gills – Heart

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Explanation

NCERT, P -282, Circulatory Pathway, Para 2

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In single circulation, the heart pumps

oxygenated blood

deoxygenated blood

mixed blood

blood–nutrients

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Explanation

NCERT, P -282, Circulatory Pathway, Para 2

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The special system of blood vessel giving blood to heart is known as

coronary system

systemic system

pulmonary system

fibrous system

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Explanation

NCERT, P -286, Double Circulation, last line

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What does systemic circulation provide to tissue?

nutrient

oxygen

other essential substances

all of these

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Explanation

NCERT, P -286, Double Circulation

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Which of the following order is correct?

Veins – capillaries – arteries

Arteries – arterioles – capillaries – venules – veins

Arterioles – Arteries – capillaries – venules – veins

Arteries – arterioles – venules – capillaries – veins

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Explanation

NCERT, P -287, Figure-18.4

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The hepatic portal system is

Between digestive tract and hypothalamus

Between digestive tract and liver

Between liver and hypothalamus

Between liver and Pituitary

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Explanation

NCERT, P -286, Double Circulation

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The hepatic portal ________ carries blood from ________ to liver before it is delivered to the ________.

vein, Pancreas, Pulmonary

artery, intestine, systemic

vein, intestine, systemic

artery, Pancreas, Pulmonary

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Explanation

NCERT, P -286, Double Circulation

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