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

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

HARD

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See the figure of the vertical section of human heart given below certain parts have been indicated by letters. Select the correct answer in which these letters have been correctly paired with parts they indicate

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Important Questions on Body Fluids and Circulation

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

The QRS complex in a standard ECG represents:

MEDIUM

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

Assertion (A): Heart of fishes is called branchial heart.
Reason (R): It receives deoxygenated blood from body parts.
The correct option among the following is

EASY

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

Match the different types of heart given in column A with organisms given in column B. Choose the correct combination.

Column A	Column B
P. Neurogenic heart.	i. Human
Q. Bronchial heart.	ii. King crab
R. Pulmonary heart.	iii. Shark

EASY

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.

MEDIUM

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.

EASY

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

Sketch and label the conducting system of human heart.

MEDIUM

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:

MEDIUM

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

Recognize the figure and find out the correct matching?

Question Image

EASY

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

Write notes on the working of the heart of man.

EASY

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	$(d)$	$0.8 \sec$
		$(e)$	$0.3 \sec$

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 $ECG$ .

Question Image

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

HARD

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

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

MEDIUM

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

In the electrocardiogram, QRS complex stands for:

Question Image

MEDIUM

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

MEDIUM

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

Describe the structure of the heart of man with the help of a neat labelled diagram.

EASY

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

Assertion (A): Pulmonary aorta in human embryo communicates with systemic aorta by a thin vessel called ductus arteriosus.
Reason (R): In the heart of the human embryo, oxygenated and deoxygenated blood is completely separated.

See the figure of the vertical section of human heart given below certain parts have been indicated by letters. Select the correct answer in which these letters have been correctly paired with parts they indicate

Important Questions on Body Fluids and Circulation

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