Differences in ion concentrations inside and outside a cell cause a difference in the charge of the intracellular and extracellular environments. This electrical polarization of a cell relative to its environment is referred to as cellular membrane potential. This potential serves as an energy source for a variety of cellular functions and as a way for excit ... Show More
Jan 2026
Biological Membranes
<p>This MCAT Basics podcast covers biological membranes. First, the podcast introduces a few topics regarding membranes: what they are, how they are formed, their presence in the cell, and cell-to-cell junctions. Second, it addresses transport through the membrane, including simp ... Show More
44m 24s
Apr 2025
Plant Diseases: Ion Deficiencies in Plants 🌱 GCSE Biology Learning & Revision
<p>In this episode, we will discuss ion deficiencies in plants.</p><p><strong>Healthy plant development relies on mineral ions extracted from the soil.</strong> A lack of these ions, particularly magnesium and nitrates,<strong> leads to deficiency disorders.</strong> </p><p><stro ... Show More
3m 58s