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机体活动节律的周期约为24小时,例如,机体的活动量、血压、脉搏、呼吸频率及血中激素分泌量等都呈24小时的变化周期。这些都是广为人知的事实。我们把这种变化称为昼夜节律。昼夜节律在生理学或生物学方面已有很多解释,且可从细胞形态学角度研究微细结构的周期性规律。如果详细研究一下这些细胞器的变化,粗面内质网、高尔基复合体、分泌颗粒等的变化(体积、表面积、数量的变化)是相互影响的,而且很多是反映细胞内代谢的变化,即蛋
For example, the body’s activity, blood pressure, pulse rate, respiratory rate and blood hormone secretion were 24-hour cycles of change. These are all well-known facts. We call this change a circadian rhythm. Circadian rhythms have many explanations in physiology or biology, and the periodic law of fine structures can be studied from the perspective of cell morphology. If we look at the changes in these organelles in detail, the changes in the rough endoplasmic reticulum, the Golgi complex, the secretory granules, etc. (volume, surface area, number changes) are interdependent, and many of them reflect changes in intracellular metabolism,