Crash Course
Drugs, Dyes, & Mass Transfer: Crash Course Engineering #16
Today we’re talking about mass transfer. It doesn’t just apply to objects and fluids as a whole, but also to the individual molecules and components that make them up. We’ll see that transfers of mass need their own driving force,...
Amoeba Sisters
Cell Transport
Explore the types of passive and active cell transport with the Amoeba Sisters! Table of Contents: Intro 00:00 Importance of Cell Membrane for Homeostasis 0:41 Cell Membrane Structure 1:07 Simple Diffusion 1:45 What does it mean to "go...
Amoeba Sisters
What is ATP?
Table of Contents: 00:00 Intro 0:40 Some Examples of ATP Uses in Cell Processes 1:14 What is ATP? 1:52 How do we get ATP? 3:05 How does ATP work? Note: We received an excellent comment in an older video (about cellular respiration) that...
Bozeman Science
Electrochemical Gradient
In this video Paul Andersen explains how the electrochemical gradient is a combination of the chemical and electrical gradient of ions. As ions move across a membrane the potential change creates a hidden force that isn't always apparent.
TED-Ed
TED-ED: The motion of the ocean - Sasha Wright
The constant motion of our oceans represents a vast and complicated system involving many different drivers. Sasha Wright explains the physics behind one of those drivers -- the concentration gradient -- and illustrates how our oceans...
Amoeba Sisters
Diffusion
Explore how substances travel in diffusion with the Amoeba Sisters! This video uses a real life example and mentions concentration gradients, passive transport, facilitated diffusion, and explains why diffusion is critical for all...
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.
Crash Course
Big Guns: The Muscular System - CrashCourse Biology
Hank tells us the story of the complicated chemical dance that allows our skeletal muscles to contract and relax.
Crash Course
The Excretory System: From Your Heart to the Toilet - CrashCourse Biology
Hank takes us on the fascinating journey through our excretory system to learn how our kidneys make pee.
Bozeman Science
The Muscular System
Paul Andersen explains the three types of muscle found in humans; striated, smooth and cardiac muscle. He explains how actin and myosin interact to contract the sarcomere in a muscle. The sliding filament theory explains how ATP and...
Curated Video
Transporte en las Células: Difusión y Ósmosis
Este video explica cómo las células absorben sustancias útiles y eliminan desechos mediante difusión, ósmosis y transporte activo. Estos procesos ocurren a través de la membrana celular y permiten el intercambio de materiales entre las...
Curated Video
What is Diffusion? How Does it Work? What Factors Affect it? #7
This video covers - What diffusion is - How it works - How it applies to cell membranes - The 3 factors that affect the rate of diffusion (concentration gradient, temperature, surface area) Exam board specific info: KS3 All relevant to...
Curated Video
Biology - Kidney Failure (Kidneys Part 3/3) #29
This video covers: - What happens when the kidneys stop working (kidney failure) - How we can treat kidney failure - What dialysis is, and how it cleans the blood - How a kidneys transplant works
Curated Video
GCSE Biology - Transport in plants - Translocation (Phloem) and Transpiration (Xylem) #51
Learn how plants transport sugars via the phloem (translocation) and water via the xylem (transpiration) between the roots and leaves. We also cover the factors that affect the rate of transpiration: light intensity, temperature,...
Curated Video
GCSE Biology - Specialised Exchange Surfaces
This video covers: - What exchange surfaces are - The key features of exchange surfaces - Specific examples including alveoli, villi, root hair cells, and leaves
Curated Video
GCSE Biology - Osmosis #8
In this video, we cover: - What osmosis is - How osmosis works - How to understand water concentration Exam board specific info: AQA - Suitable for everyone IGCSE Edexcel - Suitable for everyone Edexcel - Suitable for everyone OCR 21st...
Curated Video
GCSE Biology - Active Transport #9
This lesson covers: - What active transport it - How it's different to diffusion - How root hair cells are adapted to absorb mineral ions Exam board specific info: AQA - Suitable for everyone IGCSE Edexcel - Suitable for everyone Edexcel...
The Noted Anatomist
Resting membrane potential
This brief video tutorial briefly discusses resting membrane potential: 0:00. Introduction 0:53. What is a resting membrane potential? 1:33. How is a RMP measured? 4:12. How do we get a RMP at cell membranes? 9:04. How is the RMP...
The Noted Anatomist
Membrane transport
This brief video tutorial briefly discusses cell membrane transport: 0:00. Introduction 0:15. Permeability of cell membrane 2:57. Diffusion - 3:08. Simple diffusion - 3:37. Facilitated diffusion (ion leak channels, voltage gated...
Curated Video
Factors Affecting Diffusion and Fixed Law
This is an educational video that discusses the factors that affect diffusion, which is the process by which particles move from an area of high concentration to an area of low concentration. The video outlines three key factors that...
Catalyst University
Anatomy & Physiology of Gustation
In this video, we explore the following: [1] Anatomy, location, and organization of taste buds [2] Biosignaling events for all gustation senses (salty, sweet, etc.) [3] Gustatory pathway to the brain
Catalyst University
Biosignaling - G-protein-coupled Receptors PLC, DAG, & IP3
Biosignaling - G-protein-coupled Receptors PLC, DAG, & IP3
Catalyst University
Fick's First Law (1): Diffusion, Flux, and Concentration Gradients
Fick's First Law (1): Diffusion, Flux, and Concentration Gradients
Catalyst University
Fick's First Law (3): Graphical Estimation of Concentration Gradient
Fick's First Law (3): Graphical Estimation of Concentration Gradient