If chronic psychological stress elevates cortisol, why does bone density decline more sharply during aging, rather than exhibiting immediate and reversible changes?

💡 Explanation

Chronic stress increases cortisol, leading to increased bone resorption by osteoclasts; because aging processes make osteoclasts resistant to apoptosis, the effect accumulates over time. Therefore, bone density declines more sharply with age, rather than showing immediate changes, as the cellular regulatory mechanisms weaken, rather than hormone compensation fully offsetting the effects.

• Which outcome impairs stability when negative feedback loops regulate thyroid?
• A burn patient's skin barrier is compromised, leading to increased risk. Which mechanism explains why bacterial infection becomes more likely?
• If a patient undergoes gastric bypass surgery, which consequence follows regarding appetite regulation hormones?
• In Alzheimer's disease, which mechanism explains why neurodegenerative pathology propagates across spatially distinct brain regions?
• A patient exhibits resistance to insulin due to prolonged elevated levels. What distinguishes the downstream signaling in cells exposed to excessive insulin from cells with normal insulin sensitivity?
• Why does protein aggregate formation increase in neurons affected by age-related lysosomal dysfunction?