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Question

Muscles of alimentary canal are chiefly _______________.

A
Striated and Neurogenic
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B
Unstriated and Neurogenic
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C
Striated and Myogenic
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D
Unstriated and Myogenic
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Solution

The correct option is D Unstriated and Myogenic
  • The alimentary canal is made up of smooth muscles which are involuntary and controlled by the autonomic nervous system.
  • Single-unit smooth muscles are present in the alimentary canal and they can contract regularly without input from a motor neuron (myogenic) as opposed to multi-unit smooth muscle, which is neurogenic - that is, its contraction must be initiated by an autonomic nervous system neuron (neurogenic).
  • Hence, muscles of the alimentary canal are chiefly unstriated and myogenic.

So the correct answer is option D.

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