If a drug inhibits pancreatic beta-cell ATP-sensitive potassium (KATP) channels without affecting insulin receptor binding, which consequence follows regarding glucose homeostasis in a patient with insulin resistance?

💡 Explanation

Inhibiting KATP channels in pancreatic beta-cells causes membrane depolarization, leading to increased calcium influx and insulin secretion because these channels normally hyperpolarize the cell. Therefore, insulin secretion increases at baseline, rather than reducing GLUT4 translocation, which depends on insulin receptor signalling.

• If a novel drug prevents the reuptake of a specific neurotransmitter at a synapse in the brain, which consequence follows for signal transmission?
• Why does amenorrhea (absence of menstruation) sometimes occur in the luteal phase, despite normal estrogen levels earlier in the cycle?
• Why does chronic activation of hepatic stellate cells occur during persistent insulin resistance?
• Why does the oxygen saturation in arterial blood sometimes fail to fully equilibrate with alveolar oxygen partial pressure during intense exercise, even when ventilation rate is high?
• If a cell continually expresses a receptor protein without appropriate regulatory signals, which consequence follows regarding hormone sensitivity?
• Why does sustained muscle contraction lead to increased perceived effort and diminished force output during endurance activities?