Paging Dr. Samir

In this episode of Paging Dr. Samir , we take the next step from transport and gradients into electrophysiology—the rules that determine when cells fire, when they stay silent, and when electrical systems fail without warning. Dr. Samir breaks down resting membrane potential, thresholds, action potentials, repolarization, and refractory periods as clinical decision points rather than abstract wave...

In this episode of Paging Dr. Samir , we move from homeostasis down to the cellular level to explain why organ failure always starts with membrane failure. Dr. Samir characterizes cell membranes as control interfaces, not anatomical diagrams, and explains how transporters, pumps, and gradients drive excitability, fluid shifts, and electrical stability. Using real clinical examples like hyperkalemi...

Welcome to the first episode of  Paging Dr. Samir , where physiology stops being abstract and starts making clinical sense. In this episode, Dr. Samir breaks down the  single most important concept in all of medicine: homeostasis . Not anatomy. Not pharmacology. Homeostasis — the body’s relentless effort to maintain internal stability in a constantly changing world. This isn’t a lecture full of sl...