Which of the following is not true for hormones?

  • A
    They are not available again after the process is over.
  • B
    Hormones are directly poured into blood.
  • C
    They induce or inhibit biochemical processes.
  • D
    Each and every hormone of human is always chemically protein.

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Which of the following acts as a second messenger?

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Statement $-II :$ Receptors of iodothyronines are present on the plasma membrane.

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Which of the following is the correct function of the endocrine system with reference to chemical coordination?

Given below are two statements.
Statement $I$: Mode of action of catecholamines,peptide and polypeptide hormones is through cell membrane receptors.
Statement $II$: These hormones are non-steroid,water soluble and lipid insoluble hormones.
In the light of above statements,choose the correct option from below:

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