a substance that all living organisms produce that brings about a chemical reaction without being altered itself

효소, 촉매

any of a class of organic substances that do not dissolve in water that include many natural oils, waxes, and steroids

지질, 지방

a junction between two nerve cells, consisting of a minute gap across which impulses pass by diffusion of a neurotransmitter

시냅스

the genetic makeup of an organism, determined by the combination of genes inherited from its parents

유전자형

a type of cell division that creates reproductive cells with half the usual number of chromosomes

감수 분열

a type of cell division that results in the formation of two daughter cells, each having the same number of chromosomes as the parent cell

유사분열

the system of glands and organs that produce and release hormones into the bloodstream, regulating various physiological functions and maintaining homeostasis

내분비계, 내분비학

a gland that secretes substances, such as enzymes or mucus, through ducts that lead to the external environment or a body cavity, rather than directly into the bloodstream

외분비선, 엑소크라인

a steroid hormone that the body produces and is used in medicine to help cure skin diseases

코르티솔

a long, slender projection of a nerve cell that conducts electrical impulses away from the cell body towards other neurons or target cells

축삭

