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
Aug 20
Essentials – Stimulants and Cognitive-Enhancing Drugs
In this episode, we explore stimulants and cognitive-enhancing drugs, medications used to improve alertness, attention, memory, and cognition. You’ll learn how commonly used agents such as amphetamines, methylphenidate, modafinil, caffeine, donepezil, rivastigmine, galantamine, a ... Show More
15m 5s
Aug 13
Essentials – Physiology of the Renal Tubular System
Why does a patient on furosemide end up needing a potassium supplement? In this episode we walk the length of the nephron— proximal tubule, loop of Henle, distal convoluted tubule, and collecting duct—and trace exactly how each segment reabsorbs and secretes to keep sodium, water ... Show More
26m 15s
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
Feb 2023
Action Potential & Graded Potentials
In this episode, Dr Matt and Dr Mike discuss how the nervous system allows us to walk, talk, smell, taste, hear, and feel! This episode is about the electrical and chemical signals that the body sends called action potentials!For a video on this topic we suggest that you watch: A ... Show More
1h 2m
Feb 2022
Electrolyte Physiology (Na+, K+, Cl-, Ca2+, and Mg2+)
In this BIG episode, Dr Matt & Dr Mike discuss electrolytes and ions! They explain what important roles substances like sodium (Na+), Potassium (K+), Chloride (Cl-), Calcium (Ca2+), and Magnesium (Mg2+) play in the body!What happens when we have too much or too little??*This cont ... Show More
2 h
Apr 2021
B/B: The Cell MCAT Review
Biology/Biochemistry: In this third episode of biology/biochemistry, we talk about the cell. Topics like the cell theory, organelles, eukaryotes vs. prokaryotes, viruses, and more.
40m 47s