| nuclear envelope |
a membrane system that surrounds the nucleus of eukaryotic cells. Consists of inner and outer membranes, separated by perinuclear space and perforated by nuclear pores.
Ãâó: www.geocities.com/HotSprings/3982/dictionary.html
|
|---|---|
| nuclear fusion |
The process by which heavier atomic nuclei are built from lighter ones, releasing great amounts of energy in the process.
Ãâó: www.geocities.com/CapeCanaveral/Launchpad/1364/Glo...
|
| nutrition |
The taking in and use of food and other nourishing material by the body. Nutrition is a 3-part process. First, food or drink is consumed. Second, the body breaks down the food or drink into nutrients. Third, the nutrients travel through the bloodstream to different parts of the body where they are used as "fuel" and for many other purposes. To give the body proper nutrition, a person has to eat and drink enough of the foods that contain key nutrients.
Ãâó: www.stjude.org/glossary
|
| nude mouse |
A type of laboratory mouse that is hairless, lacks a normal thymus gland, and has a defective immune system because of a genetic mutation. Athymic, nude mice are often used in cancer research because they do not reject tumor cells, from mice or other species.
Ãâó: www.stjude.org/glossary
|
| nutrient |
A chemical compound (such as protein, fat, carbohydrate, vitamins, or minerals) that make up foods. These compounds are used by the body to function and grow.
Ãâó: www.stjude.org/glossary
|