Category: N

Nondietary protein calories.  

The pervasive question of whether behavior is the result of heredity or environment.  

An inanimate medium consisting of plant and/or animal components, occurring naturally in which other organisms can grow.  

Noninvasive, nonexperimental studies conducted under natural conditions primarily through observation.  

A philosophy that contends that whatever occurs naturally is good.  

A condition of immunity that results when a person has a disease, builds antibodies against the disease, and recovers from the disease. The immunity from disease which a newborn baby has from birth and which is inherited or acquired in the uterus or from the mother’s milk. Stage of being innately resistant or insusceptible to…

The stages through which a disease passes.  

Feeling elation or euphoria without the use of psychoactive drugs.  

The combined use of all three rhythm techniques of contraception. Any of several methods of family planning that do not involve the use of drugs (e.g., oral contraceptives), devices (e.g., diaphragm or intrauterine device), or surgical intervention (sterilization). In natural family planning methods several ways are used to determine the time of ovulation and thus…

Naturally occurring situations that allow researchers to test the effects of one variable upon another.