Pulse of Physiology

Discover how neurons send electrical signals with action potentials. This episode explains the phases of an action potential—depolarization, repolarization, and hyperpolarization—and highlights the ro...

20 Tammi 20257min

Learn about graded potentials and how they differ from action potentials. This episode explains depolarization, hyperpolarization, EPSPs, IPSPs, and how summation determines whether a neuron reaches t...

17 Tammi 20255min

Take a big-picture look at the nervous system, its sensory, integration, and motor functions, and how feedback loops regulate the body. Understand the roles of afferent, interneurons, and efferent pat...

17 Tammi 20254min

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 s...

17 Tammi 20256min

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.

15 Tammi 20256min

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 en...

15 Tammi 20255min

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 metabo...

10 Tammi 20255min

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 fu...

10 Tammi 20256min