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Biology : Human Circulation


Given the QUESTION, identify the ANSWER

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Multiple choice

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1.

The left auricle of the heart receives _______ blood from the lungs.

  oxygenated

  deoxygenated

 

2.

When the auricles of the heart contract, the ventricles relax, and vice versa.

  True

  False

 

3.

The process of circulation of blood in the heart begins with the _______ of the auricles of the heart.

  relaxation

  contraction

 

4.

During the atrial systole, the openings of the pulmonary vein and the vena cava are _______.

  open

  closed

 

5.

During the atrial systole, the atrial muscles _______.

  relax

  contract

 

6.

With reference to the heartbeat, the word 'systole' refers to a relaxation phase whereas the word 'diastole' refers to a contraction phase.

  True

  False

 

7.

During the ventricular systole, the semilunar valves are closed.

  True

  False

 


 
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