Endocrine regulation Practice Questions
23 free Endocrine regulation practice questions for the USMLE Step 1, each with the correct answer and a detailed explanation. Open any question below, or take the full set as an interactive quiz.
Questions
23 questions
All Endocrine regulation questions
- Q1. Which of the following is the most common mechanism by which hormone secretion is regulated in the endocrine system?
- Q2. In the HPA axis, what is the correct sequence of hormone release during a stress response?
- Q3. Elevated circulating cortisol levels will most directly inhibit which of the following?
- Q4. Which type of stimulus refers to regulation of an endocrine gland by changes in blood ion concentration or other non-hormonal blood chemicals?
- Q5. Which anterior pituitary hormone is directly stimulated by (TRH)?
- Q6. If circulating free thyroid hormone (T3/T4) levels rise, what happens to TRH and TSH secretion under normal physiology?
- Q7. Which of the following best describes a ‘tropic’ hormone?
- Q8. In the regulation of the (HPG axis), continuous (non-pulsatile) administration of (GnRH) leads to which of the following outcomes?
- Q9. Which of the following hormones is primarily regulated by a humoral stimulus related to blood osmolarity rather than hormonal feedback?
- Q10. Which of the following pairs appropriately illustrates a hormone and its primary peripheral effect?
- Q11. The secretion of hormones in many endocrine axes is pulsatile or circadian rather than constant. What is a key advantage of such rhythmic secretion?
- Q12. During a prolonged period of high stress, which endocrine axis is most directly responsible for maintaining elevated glucocorticoid levels?
- Q13. Which of the following correctly describes the control of (TSH) secretion under normal physiology?
- Q14. Which regulatory mechanism is least likely to apply to the secretion of prolactin from the anterior pituitary under physiological conditions?
- Q15. Which of the following endocrine regulation scenarios illustrates a ‘short-loop’ negative feedback mechanism?
- Q16. Which of the following glands is considered a ‘secondary’ endocrine gland (i.e., not primarily endocrine) but still contributes to endocrine regulation?
- Q17. Which of the following best describes how sex steroids regulate the HPG axis in adults under normal conditions?
- Q18. Which physiologic effect is most directly mediated by glucocorticoids like cortisol during prolonged stress?
- Q19. Which of the following best describes the role of the median eminence in endocrine regulation?
- Q20. Which of the following describes an endocrine control mechanism where a hormone from a target gland rapidly suppresses its upstream regulators (within minutes)?
- Q21. Which of the following is NOT a typical mode of stimulus for hormone secretion in endocrine glands?
- Q22. Which gland pair is correctly matched with its primary endocrine output and a major physiological function?
- Q23. Which situation would likely lead to increased (GH) secretion from the anterior pituitary?