Visual Learning Systems
Understanding Selective Permeability
In this video, we explore how materials move in and out of cells through the cell membrane. Using a mesh bag as a representation of the cell membrane, we observe that certain materials can enter and exit while others cannot. This video...
Curated Video
The Consequences of Osmosis
The video is a lecture presentation discussing the consequences of osmosis. The presenter explains what osmosis is and how it works, with a focus on the movement of water molecules through partially permeable membranes. They also explain...
Curated Video
Efficient Transport and Exchange in Living Organisms
This video explains the concept of efficient transport and exchange in organisms. It discusses the importance of exchanging substances with the environment, such as taking in oxygen and getting rid of waste. The video explains surface...
Institute of Human Anatomy
The Truth About the Brain: Is it Really the Fattest Organ?
In this video, the teacher explains the misconception that the brain is the fattiest organ in the human body. They clarify that while the brain does contain fatty tissue, it is not primarily made up of fat. The video explores the...
The Noted Anatomist
Muscarinic cholinergic receptors
This video tutorial discusses the Muscarinic cholinergic receptors: 0:00. Intro 0:15. What are cholinergic receptors? 0:25. What are muscarinic receptors? 1:52. Act through G-Protein coupled receptors that act through 2nd messengers...
Visual Learning Systems
Viruses and Monerans: Bacterial Structure
Practical examples show how viruses and bacteria are both beneficial and harmful to humans. Animations describe the structure of a virus, and explain how they reproduce and cause disease. Microscopic images illustrate different types and...
Curated Video
Comparing and Contrasting Eukaryotic, Prokaryotic, and Plant Cells
The video discusses the different types of cells found in living organisms and their structures. It compares and contrasts the overall structures of eukaryotic, animal, plant, and prokaryotic cells. The video explains the internal...
Journey to the Microcosmos
This Ciliate Is About to Die
It's time to explore a big question while we watch a ciliate go through its last moments.
Curated Video
Active Transport: Moving Substances Against Concentration Gradient
This video explains the concept of active transport, which is the movement of substances from a more diluted concentration to a more concentrated concentration against a concentration gradient. The video provides examples of active...
JJ Medicine
Ras Raf MEK ERK Signaling and the mTOR Pathway | Interactions and Regulation
Lesson on interactions between the Ras Raf MAPK and mTOR signaling pathways. Ras Raf MAPK and mTOR pathways have similar but distinct functions within the cell. During cell proliferation and growth, activation of these pathways is...
Catalyst University
NEW! Hexokinase Physiology, Biochemistry, and Mechanism
NEW! Hexokinase Physiology, Biochemistry, and Mechanism
Schooling Online
Biology Cells as the Basis of Life: Cell Structure - Plant Cells Part 3
Sadly, it’s their last day in the Garden of Babylon. But nothing cheers up Sally like a shopping spree! The class is off to buy souvenirs before they say farewell to this wonderful city. This lesson will conclude our introduction to the...
Curated Video
Cell Specialization: How Different Cells are Adapted to Their Functions
The video discusses cell specialization, explaining how cells are structured differently to suit their functions. Three types of specialized cells are examined, including sperm cells, egg cells, and ciliated epithelial cells. The video...
Catalyst University
Physiology of Mechanism of Natural Killer (NK) Cells
Here, we answer what are natural killer (NK) cells and how they perform immunological surveillance.
Curated Video
Diffusion: How Substances Move In and Out of Cells
This video explains how substances move in and out of cells via diffusion, which is the net movement of particles from an area of high concentration to an area of low concentration. The video first defines diffusion and illustrates it...
Schooling Online
Biology Cells as the Basis of Life: Cell Structure - Plant Cells Part 2
Sally’s field trip to the Garden of Babylon is turning into a road trip. Her first stop is the post office. It’s not every day that a stork delivers your mail! This lesson will continue unearthing the structure of plant cells, focusing...
Professor Dave Explains
Neural Conduction, Action Potential, and Synaptic Transmission
We have probably heard that neurons are the cells that transmit information around the body. But how does this work? Is it actual electricity? Like from the wall socket? What is a synapse? What happens there, in between one neuron and...
Curated Video
Factors Affecting Diffusion and Impact on Organisms
This video discusses the concept of diffusion in biology, with a focus on what affects the rate of diffusion and its impact on organisms. The video explains that the rate of diffusion is affected by the concentration gradient,...
Catalyst University
Overview & Comparison of Water- vs Lipid-Soluble Hormones
This video includes a basic introduction to the endocrine system and then a comparison of the signaling between water-soluble and lipid-soluble hormones.
Professor Dave Explains
Signal Transduction in Immune Cells: Receptor-Ligand Interactions
Now that we know some things about immune cell structure and function, we need to start understanding how these cells interact on the molecular level, and how signals are translated into cellular response. This means looking at...
Journey to the Microcosmos
The Many Ways Microbes Eat, Get Eaten, and Poop | Compilation
This is a world where microbes are both residents and food, which means that occasionally, we’ll have to spend our time together watching organisms, whose bodies are fractions upon fractions upon fractions of a millimeter in size, turn...
Journey to the Microcosmos
Stentors Single-Celled Giants
It's time to meet a single-celled organism that is bigger than a tardigrade! We'll learn how Stentors reproduce, why they look like trumpets, and why some of them are just SO BLUE!
Institute of Human Anatomy
The Importance of Vitamin C for Your Body: From Scurvy to Immune System Support
This video explains the importance of vitamin C in the body, including its role as a powerful antioxidant and its association with scurvy. It also discusses how vitamin C is absorbed and excreted in the body, and its essential role in...