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Pace maker is

a)

Instrument for measuring heart beat

b)

Instrument for measuring pulse rate

c)

AV node that provides impulse for heart beat

d)

Sinu-auricular node that provides impulse for heart beat



Question ID - 3619 | SaraNextGen Top Answer

Pace maker is

a)

Instrument for measuring heart beat

b)

Instrument for measuring pulse rate

c)

AV node that provides impulse for heart beat

d)

Sinu-auricular node that provides impulse for heart beat

1 Answer
127 votes
Answer Key / Explanation : (d) -

(d)

The oxygenated and deoxygenated blood are forced into their respective ventricles through atrioventricular opening by the contraction of atria. The contraction of atria is initiated and activated by the sinoatrial node (SA node) commonly called pacemaker. It spreads waves of contraction across the walls of atria  muscle fibres at regular intervals. 

127 votes


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