ATI LPN
Medical Surgical Endocrine ATI Questions
Question 1 of 5
The approx ratio of fat : CHO energy stores is:
Correct Answer: D
Rationale: Fat stores vastly exceed carbohydrate (glycogen) stores, approximately 40:1 in a typical human, reflecting fat's higher energy density.
Question 2 of 5
VIP:
Correct Answer: B
Rationale: VIP (vasoactive intestinal peptide) relaxes smooth muscle and increases intestinal water/electrolyte secretion.
Question 3 of 5
Which hormone acts on bone to release calcium into the blood?
Correct Answer: D
Rationale: Parathormone, or parathyroid hormone, is produced and secreted by the parathyroid glands. Low calcium levels will stimulate release of parathyroid hormone, which increases the plasma level of calcium. Parathormone acts on the renal tubules to increase the excretion of phosphorus in the urine and to stimulate the reabsorption of calcium. Parathormone also acts on bone, causing the release of calcium from the bone into the bloodstream.
Question 4 of 5
If an endocrine gland begins to hypersecrete, it usually causes which result?
Correct Answer: A
Rationale: Hyperplasia (increased cellular growth) is the usual cause of hypersecretion of an endocrine gland.
Question 5 of 5
Which actual structural unit secretes insulin?
Correct Answer: C
Rationale: The actual structural unit that secretes insulin is the beta cell. Beta cells are found on the islets of Langerhans, which are in the pancreas.