TED-Ed
TED-Ed: Can steroids save your life? | Anees Bahji
Steroids: they're infamous for their use in sports. But they're also found in inhalers, creams to treat poison ivy and eczema, and shots to ease inflammation. The steroids in these medicines aren't the same as those used to build muscle....
Bozeman Science
Cell Membranes
Paul Andersen explains how cells are selectively permeable with the help of their cell membrane. The main constituents of the cell membrane, including cholesterol, glycolipids, glycoproteins, phospholipids, and proteins are included. The...
Bozeman Science
Transport Across Cell Membranes
Paul Andersen describes how cells move materials across the cell membrane. All movement can be classified as passive or active. Passive transport, like diffusion, requires no energy as particles move along their gradient. Active...
Crash Course
In Da Club - Membranes & Transport: Crash Course Biology
Hank describes how cells regulate their contents and communicate with one another via mechanisms within the cell membrane.
Bozeman Science
Cladograms
Paul Andersen shows you how to construct a cladogram from a group of organisms using shared characteristics. He also discusses the process of parsimony in cladogram construction. He then explains how modern cladograms are constructed and...
Bozeman Science
Signal Transduction Pathways
Paul Andersen explains how signal transduction pathways are used by cells to convert chemical messages to cellular action. Epinephrine is used as a sample messenger to trigger the release of glucose from cells in the liver. The...
Bozeman Science
Lipids
In this video Paul Andersen describes the lipids (of the fats). He explains how they are an important source of energy but are also required to cell membranes. He explains how the hydrocarbon tails in triglycerides contain energy...
SciShow
9 Poisonous Plants You Might Have Around Your House
Houseplants can be great for your mental health, but eating some of them can be far worse for your bodily health than you might think. Chapters View all DIEFFENBACHIA 0:47 2 DAFFODILS 2:44 OLEANDER 3:42 RHODODENDRONS 4:39 LILY OF THE...
Bozeman Science
The Cell Membrane
Paul Andersen gives you a brief introduction to the cell membrane. He starts by describing amphipathic nature of a phospholipid and how it assembles into a membrane. He gives an overview of the fluid mosaic model inside cells. He also...
Bozeman Science
Phases of Mitosis
In this video Paul Andersen explains the importance of mitosis and details the major steps in the cell cycle. He explains the importance of Interphase, Prophase, Prometaphase, Metaphase, Anaphase, Telophases, and Cytokinesis.
Bozeman Science
Plant Nutrition and Transport
Paul Andersen explains how nutrients and water are transported in plants. He begins with a brief discussion of what nutrients are required by plants and where they get them. He shows you dermal, vascular and ground tissue in monocot and...
Crash Course
Old & Odd: Archaea, Bacteria & Protists - CrashCourse Biology
Hank veers away from human anatomy to teach us about the (mostly) single-celled organisms that make up two of the three taxonomic domains of life, and one of the four kingdoms: Archaea, Bacteria, and Protists. They are by far the most...
Crash Course
Eukaryopolis - The City of Animal Cells: Crash Course Biology
Hank tells us about the city of Eukaryopolis - the animal cell that is responsible for all the cool things that happen in our bodies.
Curated Video
Aquaporins: What Are They?
Aquaporins are specialized membrane proteins that form water-selective channels, allowing rapid water movement across cell membranes while blocking ions and solutes. Structurally, they consist of six transmembrane α-helices and loop...
Curated Video
MHC Class I and Class II Structure: Function and Difference
The Major Histocompatibility Complex (MHC) is a tightly linked gene cluster encoding cell surface molecules essential for antigen presentation and tissue graft rejection, known as histocompatibility antigens. In humans (HLA complex on...
Neuro Transmissions
What is Action Potential?
Ready for action? Time to get your neurons firing with some action potential. If you thought resting potential was tough to understand, it seems like action potential is that much more difficult. However, thanks to Alie Astrocyte, we...
Curated Video
Passive transport: diffusion and osmosis
Passive transport is a naturally occurring phenomenon that allows us to keep things balanced in our cells. Simple diffusion, facilitated diffusion and osmosis are known types of passive transport.
Curated Video
Fluid mosaic model of the cell membrane
The plasma membrane is a complex structure made up of macromolecules that come together to form a fluid mosaic. In this video, we will look at the structure, properties and functions of the fluid mosaic model.
Curated Video
Plasma membrane: the security guard of the cell
The plasma membrane or cell membrane is an intricate structure made of macromolecules that work together to protect the cell. Think of it as the security guard of the cell - letting important substances in, and letting others out.
Curated Video
Phospholipids: types, structure and function
What exactly are phospholipids, and how do they contribute to the structure and function of cell membranes? In this video, we will explore the world of phospholipids, including their chemical structure, properties, and functions in the...
Curated Video
Viruses vs Bacteria: What's the difference
Viruses and bacteria have their own set of characteristics that distinguish them. But what are those differences? Well, in this video, we will cover the main differences between those 2 groups of microbes.
Curated Video
Cell wall
A flexible or rigid boundary protecting a cell, outside the cell membrane. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films...
Curated Video
Endocytosis
The process by which a cell can take in material from its environment by first engulfing it with its cell membrane. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
Curated Video
Electrolyte
A substance that when molten or dissolved in solution, releases free ions that make it electrically conductive A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...