NURS 8022 Chapter 18: Mechanisms of Hormonal Regulation Huether & McCance: Understanding Pathophysiology

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1. A nurse recalls that direct stimulation of the insulin-secreting cells of the pancreas by the autonomic nervous system is an example of which type of control? a. Negative feedback b. Positive fe... edback c. Neural d. Substrate-level dependent ANS: C Direct stimulation of the insulin-secreting cells of the pancreas by the autonomic nervous system is a form of neural control. Direct stimulation of insulin-secreting cells is not controlled by a feedback mechanism or by substrate-level dependency. REF: p. 439 2. Which of the following is an example of the protein hormone? a. Thyroxine (T4) b. Aldosterone c. Testosterone d. Insulin ANS: D Protein hormones are also water-soluble hormones, and insulin is a part of this group. Thyroxine, aldosterone, and testosterone are all lipid-soluble hormones and not protein hormones. REF: p. 440, Table 18-1 3. A patient who has elevated thyroxine production should be assessed for which accompanying condition? a. Increased thyroid-releasing hormone (TRH) b. Increased anterior pituitary stimulation c. Decreased T4 d. Decreased thyroid-stimulating hormone (TSH) ANS: D Secretion of TSH stimulates the synthesis and secretion of thyroid hormones. Increasing levels of T4 and T3 then feedback negatively on the pituitary and hypothalamus to inhibit TRH and TSH synthesis. With increased thyroxine production, TRH will be decreased. Increased thyroxine would lead to decreased anterior pituitary stimulation. Thyroxine is T4; its level will be elevated. REF: p. 440 4. Which of the following is a water-soluble amine? a. Growth hormone (GH) This study sour [Show More]

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