Curated Video
Introduction to Stem Cells and Their Uses in Medicine and Plants
This video provides an introduction to stem cells, exploring what they are, the different types that exist, and their potential uses in both plants and humans. The video describes the unique abilities of embryonic and adult stem cells,...
Visual Learning Systems
Investigating Plant Structure and Function: Organization in Plants
Plants possess a wide variety of structures that enable them to accomplish amazing things. This engaging series of videos investigates structures common to most plants and describes how these features enable them to survive. Familiar,...
Catalyst University
Anatomy - Positive & Negative Selection for Lymphocytes
In this video, we explore the basic processes of positive selection and negative selection, which select competent lymphocytes that don't attack our own self-cells.
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...
Journey to the Microcosmos
Colorless Euglenoids Structure and Function (and Food)
Colorless Euglenoids Structure and Function (and Food)
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...
Catalyst University
Free Energy Functions: A Physiological Perspective
Free Energy Functions: A Physiological Perspective
National Institute of Standards and Technology
NIST Puts Smart Phone Translation Technology to the Test
The National Institute of Standards and Technology (NIST) is helping the Defense Department evaluate the in-the-field performance of two-way, real-time voice translation systems for use in Afghanistan.
Professor Dave Explains
West Nile Virus (Genus Flavivirus)
West Nile Virus is a relatively new virus. It was first detected in the early 20th century, and it made it over to North America quite mysteriously in 1999. It is spread by mosquitos and can have some pretty serious effects, so let's...
Visual Learning Systems
Bacterial Shapes and Characteristics
In this video, we discuss the different shapes of bacteria and how scientists classify them based on their shape. We also learn about the three main shapes of bacteria - cocci, bacilli, and spirilla. This video is part of the 11-part...
Curated Video
Why Does Diarrhea Travel Quickly Through The Body When Digestion Takes So Long?
Diarrhea happens when there is an imbalance in water secretion and absorption within the body. This excess water causes the stool to pass through quicker than normal. Diarrhea feels like the food takes a “fast pass” out of the gut....
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
Nervous and Endocrine Systems: Nerve Cells
Students will learn the three main types of neurons and how they travel through the body's nerve network. Diagrams explain how information is received using our sensory organs and then processed by the central and peripheral nervous...
Curated Video
Introduction to the Nervous System and Neurons
This video provides an introduction to the nervous system and its key features. The speaker explains the role of the nervous system in allowing communication throughout the body using electrical impulses, and discusses the central...
Independent Producers
Inventor of Polarizing Microscope Sheds Light on Cell's Mystery
A new way of looking at live cells is revolutionizing our understanding of how molecular life works. However, it is how one scientist managed to complete his study despite facing World War II in Japan that makes his discovery so...
JJ Medicine
AKT Signaling Pathway | Regulation and Downstream Effects
Biomedical lesson on AKT (Protein Kinase B) signaling, regulation and downstream effects. The AKT signalling pathway is a highly conserved pathway that induces several important functions including glucose uptake and utilization, protein...
Science360
What is the future of synthetic biology?
What is the future of synthetic biology? Zan Luthey-Schulten, co-director at the Center for the Physics of Living Cells, answers the question on this edition of Ask a Scientist.
Professor Dave Explains
Cytokines and Chemokines
We've talked about how immune cells communicate with one another using cytokines and chemokines, but we have not yet gone into detail regarding these soluble protein signals. What are the names of these molecules, which include...
Catalyst University
Biosignaling - Receptor Desensitization by Beta-arrestin
Biosignaling - Receptor Desensitization by Beta-arrestin
Curated Video
Exploring Exponential Growth: The Power of Cell Division
In this video, the concept of exponential growth is explored using the example of cell division. By representing the number of cells each day in a table and observing the pattern, the concept of exponents or powers is introduced.
Curated Video
Understanding DNA and the Genome: The Building Blocks of Life
This video provides an introduction to DNA and the genome. It explains what DNA is, the structure of DNA, and the different components that make up DNA. The video also describes how DNA is coiled up into structures known as chromosomes...
Catalyst University
Electric Rays: 200 V Electrifying Machines!
Here we explore interesting facts about Electric Rays, cartilaginous ray-fish that can generate up to 200 V of electricity to attack their prey or defend against predators.