When you think about the body’s infrastructure, you probably think of bones. But what about the heart, the blood vessels, and the lymphatic system? In this episode of Crash Course Biology, we’ll tour the cardiovascular, lymphatic, and...

Hank brings us another simple experiment that demonstrates the important biochemical process of osmosis by turning a chicken egg into a frightening alien-looking thing.

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...

Explore the sodium potassium pump (Na+/K+ pump), with the Amoeba Sisters! This video talks about why this pump is needed and provides an overview of this type of active transport. Table of Contents: 00:00 Intro 0:48 Introducing the...

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...

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...

Hank describes how cells regulate their contents and communicate with one another via mechanisms within the cell membrane.

Paul Andersen starts with a brief description of diffusion and osmosis. He then describes the diffusion demonstration and how molecules move over time. He then explains the concepts behind the osmosis lab and how potatoes are affected...

Passive transport includes diffusion, facilitated diffusion, and osmosis, all of which move substances down their concentration gradients without energy input. Small, uncharged molecules like oxygen and carbon dioxide diffuse freely,...

Learn about “osmosis” by making a rubber egg! Then stick around for the 2 bonus experiments. And you won’t want to miss the surprise ending!!! 0:00 – Introduction of the lesson 0:23 – What you need 0:44 – Explanation of Osmosis 2:38 –...

How does a tall tree draw water from its roots to its leaves? And how does food made in leaves reach the rest of a plant? Discover how plants transport resources via the xylem and phloem. Biology - Plants - Learning Points. Transpiration...

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 video “Exploring the Solution” uses an extended example to introduce the parts of a solution and types of solutions.

This video provides an explanation of what diffusion is, how it occurs, and how to change the rate of diffusion. The concept of diffusion is demonstrated through the example of a plate of food emitting a smell that travels across a room....

live paper 1 revision session in the run up to the mocks In this session we will look at a range of topics across: Applied anatomy and physiology Movement analysis Physical training Use of data

This video is an educational tutorial on the pH scale. The presenter goes over the difference between strong acids and weak acids and explains how they dissociate in an aqueous solution. They also cover acid concentration, which is...

Fick's First Law (1): Diffusion, Flux, and Concentration Gradients

A&P I Lab | Exercise 3a: Diffusion, Osmosis, & Diffusion Rate

The video discusses the factors that affect the rate of chemical reactions. The first factor is the number of collisions with enough energy to react. Other factors include changing the pressure, concentration, surface area, and...

In this section, I talk about the properties of water, and what makes it unique. I talk about hydrogen bonds that result from the polar nature of water and why ice floats.



I also deal with diffusion and go into the 3 factors...

This video tutorial covers the primary systemic arteries in the body with a brief discussion of arterial blood pressure, pulses and anastomoses.

Lesson on Premature Ventricular Contractions (PVCs): Physiology, Triggers (caffeine, nicotine, alcohol), Signs and Symptoms, Diagnosis, and Treatment. Premature ventricular contractions (also known as PVCs) are a very common arrhythmia...

In this video, we will discuss four factors that affect the rate of diffusion: molecular weight, concentration gradient, surface area-volume ratio, and the temperature.

In this video, we will discuss the differences between primary and secondary active transport by looking at a few specific transport mechanisms.