Final answer:
Insulin affects the concentration of glucose, amino acids, and fatty acids in the blood through various mechanisms. It promotes glucose absorption by various cells, stimulates glycogen storage, minimizes amino acid loss, and reduces fatty acid levels.
Step-by-step explanation:
Insulin, a hormone that regulates blood glucose levels, has various effects on the concentration of glucose, amino acids, and fatty acids in the blood. Insulin promotes the absorption of glucose by liver hepatocytes, adipose cells, and muscle cells, reducing the concentration of glucose in the blood. It also stimulates the storage of glucose as glycogen in the liver and muscle cells. Insulin promotes the transcellular transport of amino acids, minimizing their loss in urine, and stimulates protein synthesis in muscle. Finally, insulin reduces blood fatty acid levels by inhibiting lipolysis.