Sal explains the disease ALS, amyotrophic lateral sclerosis, and takes the ice bucket challenge.

Understand how Ea is affected by changes in preload, and in turn, how the PV loop can shift. [7:42]

First, learn the difference between arterial elastance (Ea) and afterload. Then, understand how Ea is affected by changes in afterload, and in turn, how the PV loop can shift. [9:32]

Learn about allergic rhinitis diagnosis and treatment. [10:31]

A gene as a stretch of DNA on a chromosome. Alleles as versions (sequence variants) of a gene. [8:18]

Allele frequencies in populations and how they differ from genotype frequencies. [7:26]

See how Aldosterone acts on the alpha-intercalated cell to remove protons (acid) from the blood. [11:19]

Learn about how Alzheimer's Disease and Korsakoff's Syndrome affect memory. [3:49]

Go through the similarities and differences between the sarcomere and a slingshot! [7:30]

Using the signal transduction pathway for the cholera toxin to understand activation and inhibition. [5:55]

See how Renin and ACE work to cut angiotensinogen down to size. [10:18]

Find out how the pacemaker cells use the movement of sodium, calcium, and potassium to get your heart beating! [15:40]

See how muscle cells in the heart contract by allowing calcium to flow inside and bringing along some positive charge with it! [12:10]

Let's take a closer look at the weights used during subdivision in this video [2:52]. Do we have to be careful when selecting weights? Click "Click here" to learn more about Pascal's Triangle and the Binomial theorem. Click "Click here"...

A video describing the rules for naming alcohols. [12:04]

A video over viewing the Arrhenius definition of acids and bases. [7:49]

A video to show how acid strength is affected by the anion size and bond dissociation energies. [5:46]

This video [2:45] provides an overview of lighting techniques used in Pixar films.

This video [3:35] is an introduction to light quality [intensity, color, softness. Lighting can be virtual or physical.

This video [7:06] is an introduction to color scripts. A color script is a snapshot of the whole movie with a frame painted from each scene. Through the color script, you get an idea for how each story moment will be lit, and its overall...

This video [6:38] focuses on the lighting of characters in Pixar films. Different types of lighting bring the characters to life; they show the different characters' emotions and their relationships.

In this video we explore the housing and functions of a DVD player. [3:49]

In this video we explore the housing and functions of a DVD player. [3:49]

In this video we explore what is inside a hairdryer, how it is made, and how it works. [11:44]