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STD 11 - 15. Body fluids and criculations — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 15. Body fluids and criculations1 Mark
MCQ
The pace-setter in the heart is called
  • A
    Purkinje fibres
  • B
    Sino-aterial node $(SAN)$
  • C
    Papillary muscle
  • ✓
    Atrio-ventricular node $(AVN)$
✓

Answer

Correct option: D.
Atrio-ventricular node $(AVN)$
d
(d) $AV$-node delays the impulse of contraction before transmitting it to the ventricles. Thus sets the time interval between the contraction of auricles and ventricles.

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