What laboratory findings would the nurse expect in Mrs. Elber at time of diagnosis?

Correct Answer: D

Rationale: Primary hyperthyroidism (e.g., Graves' disease) shows increased thyroid activity, leading to elevated radioiodine uptake due to excess hormone production.

Correct Answer: D

Rationale: Although the high circulating levels of estrogen stimulate prolactin secretion during pregnancy, the action of prolactin on the breast is inhibited by progesterone and estrogen. After parturition, progesterone and estrogen levels decrease dramatically. Prolactin can then interact with its receptors in the breast, and lactation proceeds if initiated by suckling.

Correct Answer: B

Rationale: Hormones act via receptors on target cells, not in blood or lymph nodes; they vary chemically.

Correct Answer: C

Rationale: Steroids are lipophilic and diffuse out immediately after synthesis.

Correct Answer: D

Rationale: This describes the cAMP second-messenger system used by many hydrophilic hormones.