Which of the following hormones acts by an inositol 1,4,5-triphosphate ( $\left.\mathrm{IP}_{3}\right)-\mathrm{Ca}^{2+}$ mechanism of action?

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[Table 7.2]. Gonadotropin-releasing hormone (GnRH) is a peptide hormone that acts on the cells of the anterior pituitary by an inositol 1,4,5-triphosphate $\left(\mathrm{IP}_{3}\right)-\mathrm{Ca}^{2+}$ mechanism to cause the secretion of follicle-stimulating hormone (FSH) and luteinizing hormone (LH). 1,25-Dihydroxycholecalciferol and progesterone are steroid hormone derivatives of cholesterol that act by inducing the synthesis of new proteins. Insulin acts on its target cells by a tyrosine kinase mechanism. Parathyroid hormone (PTH) acts on its target cells by an adenylate cyclase-cyclic adenosine monophosphate (cAMP) mechanism.

Which of the Following Hormones Acts by an Inositol 1,4,5-Triphosphate IP3)−Ca2+\left.\mathrm{IP}_{3}\right)-\mathrm{Ca}^{2+}IP3​)−Ca2+

Which of the Following Hormones Acts by an Inositol 1,4,5-Triphosphate $\left.\mathrm{IP}_{3}\right)-\mathrm{Ca}^{2+}$