Which of the following is the substance that is secreted directly to the outside of the cell by fibroblasts and forms collagen fibers?
A、Fibronectin;
B、Collagen protein;
C、Collagen fibril;
D、Proteoglycan
发布时间:2025-11-27 09:20:45
A、Fibronectin;
B、Collagen protein;
C、Collagen fibril;
D、Proteoglycan