Pulse of Physiology

Unpack the basics of membrane potential and how it arises from ion gradients and permeability. Discover the sodium-potassium pump’s role in maintaining the resting membrane potential and setting the stage for action potentials.

Explore how substances move across the cell membrane via diffusion, osmosis, active transport, and exocytosis. Learn about tonicity, osmolarity, and the gradients that drive these essential processes.

Break down the process of cellular respiration into its three stages: glycolysis, the Krebs cycle, and the electron transport chain. Understand how cells generate ATP and why oxygen is critical for energy production.

Learn how enzymes act as biological catalysts to speed up reactions. This episode covers enzyme function, the factors affecting their activity, and their essential role in energy production and metabolism.

Uncover the dynamic structure of the cell membrane and its selective permeability. Explore the phospholipid bilayer, membrane proteins, and the role of cholesterol in maintaining cell integrity and function.

Discover how cells communicate through chemical messengers, receptors, and signal transduction. This episode highlights the nervous and endocrine systems’ coordination and how signals drive vital responses.

Dive into the principles of gradients and how they drive the movement of substances like ions, gases, and blood. Understand the interplay of concentration, pressure, and electrical gradients in maintaining physiological function.

Explore the body's balancing act with an introduction to homeostasis. Learn how feedback loops maintain stability, why equilibrium isn’t the goal, and the critical role of variables like oxygen and glucose in keeping you alive.