Match the Column - I with Column - II: Column – I Column II a P – wave i Depolarisation of ventricles b QRS complex i i Repolarisation of ventricles c T – wave i i i Coronary ischemia d Reduction in the size of T - wave i v Depolarisation of atria v Repolarisation of atria Select the correct option

a - i v ; b - i ; c - i i ; d - i i i

a - i v ; b - i ; c - i i ; d - v

a - i i ; b - i ; c - v ; d - i i i

a - i i ; b - i i i ; c - v ; d - i v

Match the following related to the cardiac cycle. Column I Column II i Cardiac Cycle a 0 . 2 sec ii Atrial Systole b 0 . 4 sec iii Ventricular Systole c 0 . 1 sec iv Cardiac Diastole d 0 . 8 sec e 0 . 3 sec

i - d , ii - c , iii - e , iv - b

i - d , ii - c , iii - b , iv - e

i - b , ii - c , iii - e , iv - d

i - d , ii - a , iii - e , iv - b

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The T wave on an electrocardiogram (ECG) represents repolarization.

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Important Questions on Body Fluids and Circulation

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Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways

Doctors use a stethoscope to hear the sounds produced during each cardiac cycle. The second sound is heard when:

EASY

Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways

Frog's heart when taken out of the body continues to beat for sometime.

Select the best option from the following statements:

(i) Frog is a poikilothermic

(ii) Frog does not have any coronary circulation

(iii) Heart is "myogenic" in nature

(iv) Heart is autoexcitable

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Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways

What would be the heart rate of a person if the cardiac output is 5 L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL?

EASY

Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways

Match the items given in Column I with those in Column II and select the correct option given below:

	Column – I		Column – II
a.	Tricuspid valve	i.	Between left atrium and left ventricle.
b.	Bicuspid valve	ii.	Between the right ventricle and pulmonary artery.
c.	Semilunar valve	iii.	Between the right atrium and right ventricle.

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Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways

Recognize the figure and find out the correct matching?

Question Image

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Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways

Statement (S): The sinoatrial node is called 'Pace-maker'.

Reason (R): The sinoatrial node contains specialised cardiomyocytes and generates action potentials without any external stimuli.

The correct answer is

EASY

Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways

Purkinje fibres are located in the following structure/s

EASY

Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways

Calculate the cardiac output on an individual having

70

heartbeats/min with a stroke volume of

55 mL .

EASY

Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways

The diagram below shows a typical $ECG$ .

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If the $AV$ node is not functional, which of the following options correctly represents the changes seen in the $ECG$ ?

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Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways

In the electrocardiogram, QRS complex stands for:

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HARD

Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways

Draw a well labelled diagram of schematic sectional view of Human Heart.

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Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways

Match the Column - I with Column - II:

	Column – I		Column II
$(a)$	P – wave	$(i)$	Depolarisation of ventricles
$(b)$	QRS complex	$(i i)$	Repolarisation of ventricles
$(c)$	T – wave	$(i i i)$	Coronary ischemia
$(d)$	Reduction in the size of T - wave	$(i v)$	Depolarisation of atria
		$(v)$	Repolarisation of atria

Select the correct option

HARD

Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways

Explain the internal structure of human heart. (diagram not necessary)

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Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways

Assertion $(A)$ : Dub' is one of the sounds of the heart caused during a cardiac cycle.

Reason $(R)$ : The sound is due to closure of semilunar valves present at the bases of aortic arches.

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Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways

Draw a labelled diagram of the internal structure of the human heart.

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Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways

Which one of the following statements is correct?

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Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways

Match the following related to the cardiac cycle.

Column I		Column II
$(i)$	Cardiac Cycle	$(a)$	$0.2 \sec$
$(ii)$	Atrial Systole	$(b)$	$0.4 \sec$
$(iii)$	Ventricular Systole	$(c)$	$0.1 \sec$
$(iv)$	Cardiac Diastole	$(d)$	$0.8 \sec$
		$(e)$	$0.3 \sec$

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Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways

Match List I with List II.

List I	List II
A. P-wave	I. Beginning of systole
B. Q-wave	II. Repolarisation of ventricles
C. QRS complex	III. Depolarisation of atria
D. T-wave	IV. Depolarisation of ventricles

Choose the correct answer from the options given below:

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Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways

In a standard ECG, one of the following functions of its components is not correctly interpreted.

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Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways

The QRS complex in a standard ECG represents:

The T wave on an electrocardiogram (ECG) represents repolarization.

Important Questions on Body Fluids and Circulation

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