Physiology

Homeostasis Explained: Feedback, Set Points, and Control

October 20, 2026 | Physiology | Charlie P. Lemoine

Homeostasis is the dynamic process by which organisms keep internal variables near optimal set points through feedback loops. This guide explains the components of control systems, the differences between negative and positive feedback, and how set points guide physiological regulation.

Nerve and Muscle Signaling: A Visual Introduction

October 5, 2026 | Physiology | Charlie P. Lemoine

The neuromuscular junction (NMJ) converts an electrical nerve impulse into a chemical signal that triggers muscle contraction. This guide explains where the NMJ is located, the key molecules involved, and how the sequence of events turns a single action potential into a coordinated muscle movement.