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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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