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The myogenic nature of the heart means that

ACardiac muscle excites itself without nerves
BCardiac muscle is identical to skeletal muscle
CCardiac muscle relies only on hormones
DCardiac muscle needs nerve input always
Answer & Solution
Correct answer: A. Cardiac muscle excites itself without nerves
Myogenic = origin in muscle itself. Cardiac nodal tissue auto-excites at the SAN, then propagates through AVN, AV bundle, Purkinje fibres. Neural input from the ANS modulates but does not initiate the beat.
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