Answer
The absorptive state of the body is 4 hours during and after meals. In this state nutrients are being absorbed; they may be used to meet current energy needs, needs for repair and other needs. During this period carbohydrates (CHO), lipids and proteins (aa's) are processed and metabolized in the following ways:
Carbohydrates. Glucose is being absorbed and as a result blood glucose rises. The glucose not needed for current energy demands is stored, and glycogenesis proceeds. At the same time, in this situation of adequate supply of glucose, gluconeogenesis is suppressed.
Lipids are being taken up from lacteals as chylomicrons and enter the lymphatic system; from the lymphatics they travel to the blood where lipoprotein lipase separates chylomicrons from fatty acids. The fatty acids are then taken up by adipose, muscle, and other cells, while the chylomicron residue is later discarded by the liver. Fats are formed from fatty acids (lipogenesis), and are stored in tissues-- adipose tissue, muscles and other tissues.
Proteins: Amino acids from digested proteins are used to synthesize needed proteins.
Work Step by Step
Some amino acids are are deaminated and used in ATP synthesis and fatty acid synthesis.
