Normal activities of the heart are regulated by ______________. - Biology

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Normal activities of the heart are regulated by ______________.


  • brain

  • brain

  • spinal cord

  • spinal cord

  • modified cardiac muscles

  • modified cardiac muscles



Modified cardiac muscles

Normal activities of the heart are auto-regulated by specialized muscles.

Concept: Human Heart
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2014-2015 (March)



Which of the following is mesodermal is the origin?

Where does blood absorb oxygen?

What is the the other name of 'high blood pressure'?

What is hypertension? Why is it caused? What harm can it do?

Draw a diagram of the human heart and label its parts.

The blood leaving the tissues becomes richer in:

Which vein brings clean blood from the lungs into the heart?

The human body has an organ A which acts as a double pump. The oxygenated blood coming from the lungs through blood vessel B enters the upper left chamber C of the double pump. When chamber C contracts, then blood goes into the lower left chamber D. The contraction of chamber D forces the blood to go into a blood vessel E which supplies oxygenated blood to all the organs of the body (except the lungs). The deoxygenated blood coming out of the body organs is taken by a blood vessel F to the right upper chamber G of the pumping organ. Contraction of chamber G forces the deoxygenated blood into the right lower chamber H. And finally, the contraction of chamber H sends the deoxygenated blood into the lungs through blood vessel I.

  1. What is organ A?
  2. Name the blood vessel (i) B (ii) E (iii) F, and (iv) I.
  3. What are chambers (i) C, and (ii) D?
  4. What are chambers (i) G and (ii) H?

Fill in the blank with suitable word given below:

The two lower chambers of the heart are called ___________.

Fill in the blank with suitable word given below:

The blood loaded with carbon dioxide from the body comes into the __________ of the heart.

Fill in the blank with suitable word given below:

The oxygen-rich blood from the lungs comes into the __________ of the heart.

Name any two heart conditions that occur commonly. Briefly explain each of them.

Multiple choice question. Tick (✓) the correct choice:

Human heart has

  1. one auricle and one ventricle.
  2. two auricles and one ventricle.
  3. two auricles and two ventricles.
  4. one auricle and two ventricles.

Multiple choice question. Tick (✓) the correct choice:

The heartbeat is measured by an instrument called

  1. thermometer
  2. sphygmomanometer
  3. stethoscope
  4. none of the above

Fill in the blank.

In human body, heart is located on the _____ side of the chest cavity.

Describe the function of Heart.

Name the main parts of the circulatory system.

Write a short note on human heart.

Draw a sectional view of the human heart and label on it Aorta, Pulmonary arteries, Vena cava, Left ventricle.

Choose the correct answer:
 Which chamber of the heart has the thickest wall?

Choose the correct answer:
Bundle of 'His' is found in ___________

The diagram given below represents the human heart in one phase of its activity. Study the same and then answer the question that follow:

How many valves are closed in this phase?

The help of a well-labelled diagram describes the internal structure of the human heart.

Given alongside is a diagram of the external features of the heart.
(i) Name the parts ‘1’ to ‘7’.
(ii) What happens if the coronary artery gets an internal clot?
(iii) Which type of blood does part ‘5’ carry?
(iv) Mention one structural difference between part ‘5’ and ‘4’.

Name the Following
The study of blood vascular system including arteries, veins and heart.

Name the Following
Layer, which surrounds the heart.

Name the Following
The valve present between the left atrium and the left ventricle.

State the Function: Bundle of His

State the Function: Pulmonary artery

Choose the Odd One Out:

Short answer question.

What is the role of papillary muscles and chordae tendinae in the human heart?

Which of the following has thickest wall?

The phase of contraction of heart is termed as ______.

In between which layers of pericardium, pericardial fluid is present?

Pick out the odd one.

heart, legs, brain, kidney

Blood is pumped by

The number of chambers in human heart are _______

What is the function of pericardial fluid?

Name the chambers in human heart?

‘Heart of heart’ is called ______

WBC defends the body from bacterial and viral infections.

Name two-layered protective covering of the human heart.

Name the heart valve associated with the major arteries leaving the ventricles.

Mention the artery which supplies blood to the heart muscle.

Describe the structure and working of the human heart.

What is the importance of valves in the heart?

The walls of the right ventricle are thicker than the right auricles.

Why are the walls of the left ventricle thicker than the other chambers of the heart?

Why are the walls of the left ventricle thicker than the other chambers of the heart?

How do the pulmonary artery and pulmonary vein differ in their function when compared to a normal artery and vein?

What does the QRS - complex represent?

A vein differs from the artery in having ______.

Ligamentum arteriosum is the remnant of an embryonic duct which joins ____________.

Which of the following event occurs during atrial systole?

What is the duration of joint diastole?

______ valve is present at the opening of coronary sinus

The inner surface of the ventricle is thrown into series of irregular muscular ridges called ______ 

The heartbeat about ______ in a minute.

Heart is made up of ______.

Heart is covered with double-walled membrane called ______.

Explain the structure of heart.

The heart is surrounded by a double-layered membrane called ______.

The walls of the heart is made up of cardiac muscle.

The kidney is located in the thoracic cavity between the two lungs.

The heart forms an effective barrier against infection by microbes and pathogens.


Skeletal muscle: Muscle of arm.
Cardiac muscle: ______.


Heart: Pericardium membrane.
Lungs: ______.

The walls of the heart is made up of ______.

What is the advantage of having a four-chambered heart?

Describe the flow of blood through the heart of human beings.

In which of the following parts of the human body are sweat glands absent?

Fill in the blanks of the following paragraph using just two words – arteries and veins.

___(a)___ carry oxygen-rich blood from the heart to all parts of the body and ___ (b)___ carry carbon dioxide-rich blood from all parts of the body back to the heart. ___ (c)___ have thin walls and __ (d)___ have thick elastic walls. Blood flows at high pressure in ___ (e)____. Valves are present in __ (f) ___ which allow blood to flow only towards the heart. __ (g)___ divide into smaller vessels. These vessels further divide into extremely thin tubes called capillaries. The capillaries join up to form ____ (h)_____.

Draw the neat Labelled diagram of the internal structure of the human heart.

Why is the sino-atrial node referred to as the pacemaker of the human heart?

Heart sound 'dub' is caused due to closing of ______.

The QRS complex in a standard ECG represents ______.

In human foetus, the heart begins to beat at developmental age of

Explain the term Ligamentum arteriosum.


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