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Fishes have (two/three) numbers of chambers in heart.

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Important Questions on Body Fluids and Circulation

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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

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:
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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.

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
In which animal open blood vascular system is found?
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Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways
Purkinje fibres are located in the following structure/s
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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 ii Repolarisation of ventricles
c T – wave iii Coronary ischemia
d Reduction in the size of T - wave iv  Depolarisation of atria
    v Repolarisation of atria

Select the correct option
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Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways
Write notes on the working of the heart of man.
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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
MEDIUM
Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways
How many chambers are there in frog’s heart
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): Heart of fishes is called branchial heart.
Reason (R): It receives deoxygenated blood from body parts.
The correct option among the following is
MEDIUM
Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways
Draw a labelled diagram of the internal structure of the human heart.
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.
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.
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Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways
Difference between systolic and diastolic blood pressure is known as –
 
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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?  
MEDIUM
Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways
Assertion (A): The heart of fish is described as the venous heart.
Reason (R): It supplies blood only to gills.
The correct option among the following is
EASY
Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways
The QRS complex in a standard ECG represents:
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Biology>Human Physiology>Body Fluids and Circulation>Circulatory Pathways
Papillary muscles are found in mammalian