please expert solve and clear my doubt question

Dear student, Option 4 is correct. SA node is auto excitable tissue which generates heart impulses at highest rate. Hope this information helps,Regards.

  • 2
The sinus node continuously generates electrical impulses, thereby setting the normal rhythm and rate in a healthy heart. Hence, the SA node is referred to as the natural pacemaker of the heart
  • 0
What are you looking for?