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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
In higher vertebrates, $SA-$node helps in
  • A
    Conduction of blood
  • ✓
    Initiation of heart beat
  • C
    Opening of tricuspid valve
  • D
    Opening of bicuspid valve
✓

Answer

Correct option: B.
Initiation of heart beat
b
Sinu-auricular Node ($SA-$node) or pacemaker is found in right auricle of heart. This initiates heart beat

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