ScienceIQ.com

Why does popcorn pop?

Popcorn is the most amazing food! It all starts with a kernel only several millimeters in diameter which explodes into a 40-50 times bigger fluffy, tasty, white wonder. The kernel is made of three parts: the pericarp, the endosperm and the germ. The pericarp is the outer shell, which is air-tight and extremely tough. The endosperm is mostly ...

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WhyDoesPopcornPop
Physics

Kinetic Theory of Gases

Air is a gas, and gases can be studied by considering the small scale action of individual molecules or by considering the large scale action of the gas as a whole. We can directly measure, or sense, ... Continue reading

KineticTheoryofGases
Astronomy

Stopping In Thin Air

Imagine you're going very fast -- much faster than a race car. In fact, imagine you're going 100 or 200 times faster than a race car. When you reach your destination, you need to stop relatively ... Continue reading

StoppingInThinAir
Biology

Batesian Mimicry

If you ever got stung by a wasp you would probably avoid all flying insects which resemble the brightly-colored yellow and black wasp. If you were a bird and certain types of butterflies gave you a ... Continue reading

BatesianMimicry
Biology

What's So Funny?

There's an oft-repeated scientific definition of laughter as one or more forcibly voiced, acoustically symmetric, vowel-like notes (75 ms duration) separated by regular intervals (210-218 ms), and a ... Continue reading

Laughter

The Human Pancreas

HumanPancreasThe pancreas is a body organ that does some heavy lifting. It carries on two important functions relating to digestion and the regulation of blood sugar. The exocrine, the larger function, makes enzymes to help digest food such as proteins and fats. The exocrine portion releases these enzymes into the pancreas duct where it flows into the duodenum and mixes with food after it has left the stomach.

The other function of the pancreas is called endocrine. It consists of scattered cells called islet cells which make hormones such as insulin and glucagon which regulate the body's blood sugar and hold it within a very tight range. If your blood sugar is too low, your brain won't function properly. If it is too high you would have diabetes which leads to damage to various body parts.

The pancreas is about the size of a small oblong loaf of bread. In humans, it is located in the back of the abdomen, behind the stomach and intestines, just above the belly button and against the spine. If affected by disease, the pancreas does not regenerate itself. If you lose more than 90% of your islet cells, you end up with diabetes. If you have chronic pancreatitis, an inflammation of the pancreas, you will have trouble with digestion and have to take enzyme pills. The pancreas works hard to process the food we eat.