NEET Sample Paper NEET Sample Test Paper-78

  • question_answer
    Which of the following is responsible for amplification of signal in hormone action?

    A)  \[{{P}_{1}}{{P}_{2}}\]                      

    B)  Insulin                

    C)  \[I{{P}_{3}}\]                         

    D)  Sodium

    Correct Answer: C

    Solution :

    Ionositol triphosphate \[\left( I{{P}_{3}} \right)\] is formed by the degradation of phosphatidy ionositol 4, 5-biphosphate \[({{P}_{1}}{{P}_{2}})\] by the enzyme phosphodiesterase. \[I{{P}_{3}}\] acts as intracellular secondary messenger and helps to amplify the hormonal signal by stimulating the release of \[C{{a}^{2}}^{+}\] from ER target cells.


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