Final answer:
The claim that glucosamine is the most important substance in the synthesis of connective tissue is false. Collagen is the main protein of connective tissue in animals, playing a more central role than glucosamine, which is a part of some glycosaminoglycans.
Step-by-step explanation:
The claim that glucosamine is the most important substance in the synthesis of connective tissue is false. Connective tissue is composed mainly of an extracellular matrix that contains proteoglycans and protein fibers, such as collagen, which is actually the main protein of connective tissue in animals. Proteoglycans are made up of glycosaminoglycans (GAGs) covalently linked to core proteins, and glucosamine is a component of some GAGs. While important, glucosamine is not the most important substance, as collagen plays a more central role in the structure and function of connective tissues, which also includes cartilage and bone. These tissues contribute significantly to maintaining body posture and protecting internal organs.