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

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 15. Body fluids and criculations1 Mark
MCQ
Heart beat can be initiated by
  • ✓
    Sinu-auricular node
  • B
    Atrio-ventricular node
  • C
    Sodium ion
  • D
    Purkinje's fibres
✓

Answer

Correct option: A.
Sinu-auricular node
a
It’s obvious.

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