Final answer:
The purpose of the alanine cycle is to transport alanine from skeletal muscle to the liver, where it is converted to glucose through gluconeogenesis, and then sent back to the muscle. The organs involved are the muscle and the liver.
Step-by-step explanation:
The purpose of the alanine cycle, also known as the glucose-alanine cycle, is to facilitate the interchange of compounds between skeletal muscle and the liver. Specifically, alanine produced by skeletal muscles is transaminated from pyruvate, then it travels through the bloodstream to the liver. In the liver, alanine undergoes gluconeogenesis, where it is converted into glucose. This newly formed glucose is then released back into the bloodstream and can be taken up by muscle tissue, serving as a substrate for energy. This cycle is essential for maintaining blood glucose levels, especially under conditions such as fasting or intense exercise. Therefore, the correct answer to which organs are involved in the alanine cycle is a) Muscle and Liver.