Which of the following cells are the inactive forms of collagen-producing cells in elastic cartilage

The inactive forms of collagen-producing cells in elastic cartilage are known as chondrocytes. In the context of cartilage tissue, chondrocytes are the mature cells that maintain the cartilage matrix, including the production of collagen and proteoglycans.

1. Chondroblasts: These are the precursor cells that actively produce and secrete the components of the cartilage matrix, including collagen. Once they become trapped in the matrix they secrete, they differentiate into chondrocytes.

2. Chondrocytes: These are the cells that reside in the lacunae of cartilage and maintain the cartilage by producing and maintaining the matrix. In some contexts, chondrocytes can be considered inactive compared to chondroblasts when they are in a quiescent state, especially when there is little to no active matrix production.

3. Matrix: Elastic cartilage, like other types of cartilage, has a matrix that consists of water, collagen fibers, and proteoglycans, providing both flexibility and strength.

In conclusion, while chondrocytes are the primary cell types in elastic cartilage known for collagen maintenance, they may be considered "inactive" when referring to their lower activity level compared to chondroblasts.