ATI RN
Endocrine System Multiple Choice Questions Answers Questions
Question 1 of 5
The hormone progesterone is secreted by which of the following glands?
Correct Answer: B
Rationale: Progesterone, secreted by the corpus luteum (ovarian follicle post-ovulation), sustains pregnancy by relaxing the uterus. Pituitary regulates via LH, adrenals produce cortisol, melatonin (pineal) isn't a gland here it's a hormone. Corpus luteum's temporary endocrine role distinguishes it, critical for gestation, contrasting with permanent glands or misnamed options.
Question 2 of 5
All of the following increase BSL except
Correct Answer: D
Rationale: LH (luteinizing hormone) doesn't directly raise blood sugar it stimulates gonadal hormones (e.g., testosterone). T4 boosts metabolism, mobilizing glucose. Cortisol promotes gluconeogenesis. Growth hormone counters insulin, raising glucose. LH's reproductive focus distinguishes it, lacking metabolic impact, unlike glucose-elevating hormones.
Question 3 of 5
In the thyroid
Correct Answer: D
Rationale: Thyroglobulin is synthesized in thyroid follicular cells (rough ER), secreted into colloid for iodination, not formed there key to T3/T4 production. Iodide transport is active (Naâº/Iâ» symporter). Reverse T3 (rT3) is inert. Most T4 converts to T3 peripherally. Thyroglobulin's cellular origin distinguishes it, critical for thyroid synthesis, unlike transport, activity, or metabolism truths.
Question 4 of 5
Which pattern of lab findings is most consistent of diabetes insipidus, note that the values are 24 hour urine volumes of ketones, glucose and protein respectively
Correct Answer: D
Rationale: Diabetes insipidus (DI) features high urine volume (e.g., 6.4 L/24h) with no ketones, glucose, or protein dilute urine from low ADH. '400' lacks units/context. High protein (2+) suggests kidney issues, not DI. High glucose (4+) fits diabetes mellitus. High volume, normal solutes distinguish DI, key to its water-losing pathology, unlike incomplete, proteinuric, or glucosuric patterns.
Question 5 of 5
Insulin secretion is stimulated by all of the following except
Correct Answer: C
Rationale: Noradrenaline (via α2-receptors) inhibits insulin secretion, prioritizing glucose mobilization in stress. Mannose (metabolized like glucose), glucagon (short-term β-cell boost), and leucine (amino acid trigger) stimulate insulin. Noradrenaline's suppression distinguishes it, critical for sympathetic-glucose balance, unlike stimulatory sugars, hormones, or amino acids.