(2) Sugar is finally digested into glucose in human small intestine, which can be absorbed by human body and added into blood. At this time, the decrease of blood sugar content in CD segment is due to the increase of insulin secretion by islet, which can regulate blood sugar, promote glycogen synthesis, accelerate blood sugar decomposition and reduce blood sugar concentration.
(3) As can be seen from the figure, the blood sugar concentration of normal people is kept at 5(m? Molar/liter).
Two. Life is beautiful. At all stages of human growth and development, there are many praises to express love for life. Newborn babies are stars of hope, childhood is a small sun, childhood is a golden childhood, and adolescence is an important period of growth and development. The remarkable feature of human morphological development is the sudden increase of height. In addition, the functions of nervous system, heart, lungs and other organs have also been significantly enhanced. After entering adolescence, the sexual organs of boys and girls are also developing rapidly. Adolescence is the golden period of physical and intellectual development in a person's life, and it is the best period to lay a good foundation for his life's health. People often praise the adolescence of life with words like "in the mood for love, golden age", while adulthood is the time to make something and achieve something. People often praise adulthood with words like "in the prime of life".
Therefore, the answers are: I. (1) digestion and absorption;
(2) insulin;
(3)5;
Two. Growth and development in infancy, childhood, adolescence, adulthood, words of praise for hope, little sun, golden childhood, golden age, sunset red.