Grade 11Zoology
Q . 1 what do you mean by autoexcitability of SA n
Q . 1 what do you mean by autoexcitability of SA node ?
1 Answer
The Heart muscles are involuntary in their contraction ability.
They are excited by special node called as sino atrial node(SA node),
a place were the contarction starts.
So in the sentence it is given that the SA node is Auto excitatory (excites on its own)
not dependent on any thing.
Auto=self
Excitability=starting the contraction function.
They are excited by special node called as sino atrial node(SA node),
a place were the contarction starts.
So in the sentence it is given that the SA node is Auto excitatory (excites on its own)
not dependent on any thing.
Auto=self
Excitability=starting the contraction function.
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