ATI LPN
Medical Surgical Endocrine Quizlet Questions
Question 1 of 5
Which of the following hormones acts by an inositol 1,4,5-triphosphate (IP3)-Ca2+ mechanism of action?
Correct Answer: D
Rationale: Gonadotropin-releasing hormone (GnRH) is a peptide hormone that acts on the cells of the anterior pituitary by an inositol 1,4,5-triphosphate (IP3)-Ca2+ 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.
Question 2 of 5
Steroid hormones are
Correct Answer: D
Rationale: Steroids are cholesterol-derived, lipophilic, and act via intracellular receptors to induce protein synthesis.
Question 3 of 5
Select the correct statement about TSH.
Correct Answer: D
Rationale: TSH from the anterior pituitary stimulates thyroid hormone production.
Question 4 of 5
The posterior pituitary
Correct Answer: A
Rationale: The posterior pituitary releases ADH (vasopressin) stored from hypothalamic synthesis.
Question 5 of 5
The anterior pituitary
Correct Answer: C
Rationale: The anterior pituitary (adenohypophysis) secretes mostly tropic hormones (e.g., TSH).