Live Quiz Arena
🎁 1 Free Round Daily
⚡ Enter ArenaQuestion
← Human Body & HealthWhy does prolonged elevated cortisol due to chronic stress often impair thyroid function?
A)Reduced TSH directly stimulates thyroxine release
B)Cortisol inhibits TSH and T4 production✓
C)Thyroid hormones enhance cortisol receptor affinity
D)Cortisol increases peripheral T3 conversion
💡 Explanation
Cortisol excess affects the hypothalamic-pituitary-thyroid axis through negative feedback loops, because chronically elevated cortisol inhibits the secretion of both TSH (thyroid-stimulating hormone) and T4 (thyroxine). Therefore, thyroid hormone production decreases, rather than cortisol directly stimulating thyroxine or enhancing its receptor affinity.
🏆 Up to £1,000 monthly prize pool
Ready for the live challenge? Join the next global round now.
*Terms apply. Skill-based competition.
Related Questions
Browse Human Body & Health →- Why does delayed thrombolysis treatment worsen outcomes after ischemic stroke?
- If a person consistently sleeps during daylight hours, which consequence follows regarding their melatonin production?
- A patient experiences an ischemic stroke, and tPA is administered to restore blood flow. Which consequence follows regarding the ischemic penumbra?
- A patient with chronic venous insufficiency experiences significant leg edema. Which mechanism explains why compression stockings effectively reduce this edema, especially considering lymphatic system involvement?
- Why does rheumatoid arthritis flare up after certain infections?
- Why does an ectopic pregnancy in the fallopian tube risk maternal mortality more than tubal ligation?