ATI RN
Endocrine System Multiple Choice Questions Answers Questions
Question 1 of 5
The body of a squirrel has to prepare for either fighting or running away by using which of the following hormones?
Correct Answer: A
Rationale: Adrenaline, from the adrenal medulla, primes the body for 'fight or flight' by boosting heart rate, glucose release, and muscle blood flow ideal for a squirrel's rapid response. Oestrogen (ovaries) and testosterone (testes) drive reproductive traits, thyroxine (thyroid) sets metabolism not acute stress. Adrenaline's rapid, systemic effects distinguish it, key to survival in danger, contrasting with long-term hormonal actions.
Question 2 of 5
regarding the thyroid hormones in plasma
Correct Answer: D
Rationale: In hypothyroidism, low T3/T4 raises TSH via negative feedback to stimulate thyroid plasma TSH is high. Glucocorticoids suppress TSH, not directly free T4. Binding proteins (e.g., TBG) rise with oestrogens (e.g., pregnancy), not hypertension total T4 rises, free stays normal. Oestrogens increase, not decrease, total T4 via TBG. High TSH distinguishes hypothyroidism's feedback loop, critical for diagnosis, unlike glucocorticoid, binding, or oestrogen effects.
Question 3 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 4 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 5 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.