If a patient experiences chronic pain due to increased substance P release from nociceptors following nerve damage, which consequence involving descending modulation is most likely?

💡 Explanation

Reduced inhibitory interneuron activity is likely because chronic substance P release overwhelms the gate control mechanism in the spinal cord. This excess activity diminishes the effectiveness of descending modulation from the brain, therefore lessening inhibitory influence, rather than enhancing it, allowing pain signals to ascend more readily.

• If a drug selectively inhibited retinaldehyde regeneration within the retinal pigment epithelium (RPE), which consequence follows regarding vision?
• If an Olympic weightlifter experiences complete muscle failure during a lift, with an inability to maintain grip on the barbell, which consequence explains this failure mode?
• If a macrophage encounters bacterial lipopolysaccharide (LPS) in lung tissue, which consequence follows concerning prostaglandin production?
• A patient with thrombocytosis (excess platelets) experiences increased risk of vascular occlusion. Why does platelet aggregation cause this heightened occlusion risk?
• A patient with severe burns receives a water-soluble drug. If edema significantly increases their total body water volume, which consequence follows regarding the drug's effect?
• Following a bout of streptococcal pharyngitis, what explains the development of acute rheumatic fever despite antibiotic treatment that eradicated the bacteria?