Proteins In General

Proteins form our bodies and help direct its many systems. Proteins are fundamental components of all living cells. They exhibit an enormous amount of chemical and structural diversity, enabling them to carry out an extraordinarily diverse range of biological functions. ...

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What Is a Bruise?

A bruise is a deposit of blood under the skin. It flows from tiny capillaries that break when you bump your shin on the furniture or take the batter's pop fly in the eye. The injury starts out looking ... Continue reading


How To Calculate The Volume Of A Cylinder

Calculating the volume of a cylinder is even easier than calculating its area. All you have to do is recognize that a cylinder is no more than just a bunch of circles stacked to a certain height, just ... Continue reading


Live Fast, Blow Hard, and Die Young

Massive stars lead short, yet spectacular lives. And, they usually do not go quietly, instead often blowing themselves apart in supernova explosions. Astronomers are curious about the details of the ... Continue reading


Microarrays: Chipping Away At The Mysteries Of Science And Medicine

With only a few exceptions, every cell of the body contains a full set of chromosomes and identical genes. Only a fraction of these genes are turned on, however, and it is the subset that is ... Continue reading


Your Senses Make Sense of Energy

EnergySenseYour different sense receptors are designed to gather different kinds of sensory information about the world around you. That information is in the form of different kinds of energy. Your eyes sense light which is electromagnetic energy. Your senses of taste and smell detect chemical energy. Other senses respond to mechanical or thermal energy. But even though your senses are sensitive to different forms of energy, they all convert each of them into a single kind - electrical energy.

If all the sense receptors convert all these different kinds of energy into a single kind, why is it that we have many senses, instead of just one? The answer is that each of the receptors connects to a different part of the brain. So colors, shapes, tones, smells, and flavors are mental constructs created by your brain out of sensory data. It’s the brain that converts the electrical energy into what we know as vision, sound, smell, taste, pressure, pain, or heat.