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      Question

      Proctolin is secreted by which glands in

      insects? 
      A Corpora allata Correct Answer Incorrect Answer
      B Corpora cardiaca Correct Answer Incorrect Answer
      C Male accesory glands Correct Answer Incorrect Answer
      D Neurosecretory cells Correct Answer Incorrect Answer
      E Prothoracic glands Correct Answer Incorrect Answer

      Solution

      Proctolin is a bioactive neuropeptide found in arthropods, such as insects and crustaceans, that regulates nervous activity, muscle tone, and contractile force. It is secreted by Neurosecretory cells. 

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