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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During the cardiac cycle, the ventricular systole starts about $0.1 s$ after the atrial systole. This allows atria to be completely empty their contents to ventricles. Which one of the following is a major reason for this delay?

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Important Questions on Body Fluids and Circulation

HARD

Biology>Human Anatomy and Physiology-II>Body Fluids and Circulation>Cardiac Cycle

Give the location of the following valve within the human heart.

Thebesian valve

EASY

Biology>Human Anatomy and Physiology-II>Body Fluids and Circulation>Cardiac Cycle

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

HARD

Biology>Human Anatomy and Physiology-II>Body Fluids and Circulation>Cardiac Cycle

Give the location of the following valve within the human heart.

Tricuspid valve

EASY

Biology>Human Anatomy and Physiology-II>Body Fluids and Circulation>Cardiac Cycle

Sketch the internal structure of human heart. Label all the valves present in it. Mention the function of any one valve in the heart.

MEDIUM

Biology>Human Anatomy and Physiology-II>Body Fluids and Circulation>Cardiac Cycle

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 Anatomy and Physiology-II>Body Fluids and Circulation>Cardiac Cycle

Sketch and label the conducting system of human heart.

HARD

Biology>Human Anatomy and Physiology-II>Body Fluids and Circulation>Cardiac Cycle

Give the location of the following valve within the human heart.

Eustachian valve.

MEDIUM

Biology>Human Anatomy and Physiology-II>Body Fluids and Circulation>Cardiac Cycle

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

MEDIUM

Biology>Human Anatomy and Physiology-II>Body Fluids and Circulation>Cardiac Cycle

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 Anatomy and Physiology-II>Body Fluids and Circulation>Cardiac Cycle

Purkinje fibres are located in the following structure/s

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Biology>Human Anatomy and Physiology-II>Body Fluids and Circulation>Cardiac Cycle

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 Anatomy and Physiology-II>Body Fluids and Circulation>Cardiac Cycle

How do parasympathetic neural signals affect the working of the heart?

HARD

Biology>Human Anatomy and Physiology-II>Body Fluids and Circulation>Cardiac Cycle

What does the QRS wave indicate in ECG?

HARD

Biology>Human Anatomy and Physiology-II>Body Fluids and Circulation>Cardiac Cycle

Give the location of the following valve within the human heart.

Bicuspid valve

EASY

Biology>Human Anatomy and Physiology-II>Body Fluids and Circulation>Cardiac Cycle

Write notes on the working of the heart of man.

MEDIUM

Biology>Human Anatomy and Physiology-II>Body Fluids and Circulation>Cardiac Cycle

A regular check on the unborn baby of a lady towards the end of her pregnancy showed a heart rate of 80 beats per minute. What would the doctor infer about the baby's heart condition from this?

MEDIUM

Biology>Human Anatomy and Physiology-II>Body Fluids and Circulation>Cardiac Cycle

Which one of the following statements is correct?

EASY

Biology>Human Anatomy and Physiology-II>Body Fluids and Circulation>Cardiac Cycle

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.

EASY

Biology>Human Anatomy and Physiology-II>Body Fluids and Circulation>Cardiac Cycle

Which of the following is associated with decrease in cardiac output?

MEDIUM

Biology>Human Anatomy and Physiology-II>Body Fluids and Circulation>Cardiac Cycle

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

During the cardiac cycle, the ventricular systole starts about 0.1s after the atrial systole. This allows atria to be completely empty their contents to ventricles. Which one of the following is a major reason for this delay?

Important Questions on Body Fluids and Circulation

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During the cardiac cycle, the ventricular systole starts about $0.1 s$ after the atrial systole. This allows atria to be completely empty their contents to ventricles. Which one of the following is a major reason for this delay?