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Solution


Q.

Choose the correct pathway on the transmission of impulse in the heart beat.
 a) AV-node  →  SA-node → Bundle of His → Purkinje fibres
 b) SA-node  →  AV-node → Bundle of His → Purkinje fibres
 c) SA-node  →  Bundle of His  →  AV-node  →  Purkinje fibres
 d) AV-node  →  Bundle of His  → SA-node   →  Purkinje fibres
1 A
2 B
3 C
4 D

Ans.

(b) The correct pathway of  the transmission of impulses in the heart beat is
     SA-node → AV-node → Bundle of His → Purkinje fibres