Lack of Sleep Affects Genes

* deprivation [_|deprɪ^|veɪʃn]: 부족, 박탈  ex> sleep deprivation: 수면 부족

* substantial: 상당한 (= considerable, large in amount)  ex> Substantial numbers of people support the reforms.

* respondent: 응답자

* quantify [^|kwɑ:ntɪfaɪ]: try to calculate how much of it there is.  수량화하다  ex> The risks to health are impossible to quantify.

* metabolic activity: 신진대사 활성도
* circadian cycle: 생물학적 리듬