Final answer:
The statement that loose connective tissue contains all three protein fiber types—collagen, elastic, and reticular—is true. These fibers contribute to the tissue's function in mechanical support and organ protection.
Step-by-step explanation:
The statement that loose connective tissue contains all three protein fiber types is true. Loose connective tissue includes cells and extracellular matrix with fibers secreted by fibroblasts. The three main types of fibers found in loose connective tissue are collagen fibers, elastic fibers, and reticular fibers. Collagen fibers provide tensile strength and resistance, preventing tissues from being torn. Elastic fibers, made from elastin, allow tissues to stretch and return to their original shape, offering flexibility. Reticular fibers form a network that supports the tissues and the organs they connect to. Hence, loose connective tissue is endowed with these varied fibers which contribute to its function of holding organs and other tissues in place and providing mechanical support.