The Claim
Insulin enhances the sensitivity of (Na+ + K+)-ATPase to substrates such as Na+, ATP, or K+ in isolated frog skeletal muscle membranes by stimulating the enzyme under suboptimal substrate conditions, but not under conditions of maximal activation, indicating that insulin does not increase the enzyme's maximum reaction rate (Vmax).
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Insulin helps a cellular pump work better when fuel levels are low, but doesn’t make it go faster when everything’s already maxed out — it’s like giving the pump a sensitivity boost, not a power upgrade.
See the scientific wording
Insulin's stimulation of (Na+ + K+)-ATPase in isolated frog skeletal muscle membranes occurs under suboptimal conditions (10 mM K+, 0.5 mM ATP, 4 or 25 mM Na+) but not under maximal activation, suggesting insulin enhances the enzyme's sensitivity to substrates like Na+, ATP, or K+ rather than increasing its maximum reaction rate (Vmax).
What the research says
1 studyStudy: Effect of insulin upon membrane‐bound (Na+ + K+)‐ATPase extracted from frog skeletal muscle.
The study shows insulin boosts a cellular pump in frog muscle when fuel levels are low, but not when they’re high, suggesting insulin makes the pump more sensitive to its fuels rather than making it work faster overall.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.