ATI LPN
Medical Surgical Endocrine Quiz Questions
Question 1 of 5
A portal system exists between the
Correct Answer: B
Rationale: The hypothalamo-hypophyseal portal system links the hypothalamus to the anterior pituitary.
Question 2 of 5
Dwarfism may be the result of a deficiency of
Correct Answer: D
Rationale: Deficiencies in GHRH, GH, or somatomedins can cause dwarfism.
Question 3 of 5
Which of the following is NOT PRESENT when the thyroid gland is inactive?
Correct Answer: A
Rationale: An inactive thyroid has large follicles with abundant colloid and flat follicular cells due to low activity. Reabsorption lacunae (signs of hormone release) are absent. TSH would be elevated to stimulate the gland.
Question 4 of 5
Regarding the adrenal glands:
Correct Answer: D
Rationale: Conn's syndrome (primary hyperaldosteronism) causes K^+ depletion due to excess aldosterone. The medulla isn't essential, the cortex is ~90% of the gland, and 17α-hydroxylase is in zona fasciculata/reticularis.
Question 5 of 5
Calcitonin secretion is increased by:
Correct Answer: D
Rationale: Calcitonin secretion is stimulated by gastrin, CCK, secretin, and glucagon, all of which respond to high Ca2+ or digestive signals.