Why does tactile acuity diminish substantially on skin regions affected by chronic, poorly-managed type 2 diabetes?

💡 Explanation

Tactile acuity decreases in diabetic neuropathy because advanced glycation end-products (AGEs) accumulate and cross-link collagen fibers within the dermis. This stiffening reduces the deformation of mechanoreceptors needed for fine touch discrimination; therefore, the AGE accumulation decreases acuity, rather than increased receptor sensitivity.

• Why does a decrease in the ventilation-perfusion ratio (V/Q) increase hypoxemia more severely than a similar increase decreases hypercapnia?
• During intensive exercise, blood transit time through alveolar capillaries decreases. Why does arterial oxygen saturation remain relatively stable despite the reduced transit time?
• Why does chronic inflammation hinder the natural resolution process within a damaged tissue?
• If a COX-2 selective inhibitor drug preferentially blocks prostaglandin E2 (PGE2) production in osteoarthritic joints, which consequence follows regarding cartilage remodeling?
• A patient with a genetic mutation has dysfunctional von Willebrand factor (vWF). Why does this compromise the initial stages of hemostasis in small blood vessel injuries?
• If a researcher inhibits phospholipase A2 (PLA2) in immune cells responding to tissue damage, which consequence follows regarding the inflammatory pathway?