The extracellular matrix in animals:
A)is located exclusively in muscle tissue.
B)is formed by many types of cells, primarily fibroblasts, on their cell surfaces.
C)is a meshwork of insoluble fibrous proteins, primarily collagens, that assemble in a double helix.
D)differs from one tissue to the next, affecting the expression of genes in the cells that it surrounds.
E)is attached to cells by gap junctions.

Question

Quizplus · Accepted Answer

The extracellular matrix varies between different tissues and can affect gene expression in the cells it surrounds. Choices A, B, C, and E are incorrect because the extracellular matrix is not exclusively located in muscle tissue, is not formed by fibroblasts alone, is not solely made up of collagens, and is not attached to cells by gap junctions.

The Extracellular Matrix in Animals