Cells get older and die. It is a process that takes place, sometimes over days, sometimes over years.
In this course, I will cover how cells grow, mature, and then age and become senescent. I use the examples of neurons (dementia and ALS) and skin cells (aging skin) to illustrate the two ways that cells age.
By Designua. Shutterstock ID: 235015666. Neurons and neuroglial cells. Glial cells are non-neuronal cells in brain.
Atoms with an unmatched electron in their s orbital are very active. The best way to calm them down is to match them up.
Many times, energy is released. Why and how does that happen?
This course looks at hydrogen atoms when they join to form H2, or hydrogen gas. The goal is to visualize how the two electrons of two hydrogen atoms come together to form a "solid" bond.
But first, let's discuss very fast creatures.
Picture credit: By BlueRingMedia. Shutterstock ID 152409845. Illustration of the element Hydrogen.
White bubbles, ice, snow, cold breath, and clouds.
What makes them so white? There is a common theme to many of the white colors in water.
Funnily enough, a lot it has to do with air.
Snow, ice, water, cloudss.
ravas51. IMG_2395. Flickr photo-sharing. Taken Feb 5, 2013
This course highlights white color in nature.
What is the common theme between snow, splashing water, clouds, polar bear fur, whipped egg whites, and the foam on a beer head?