Question

Matrix of connective tissue proper is secreted by
(a) Mast cell
(b) Fibroblast cell
(c) Fibrocyte cell
(d) All of the above

Answer 1

Hint: It is typically spindle-shaped cells with an oval flat nucleus found in the interstitial spaces of organs. They reside in highly complex multicellular environments in the lung, ordinarily firmly opposed to the epithelium or endothelium. They are the first source of extracellular matrix (ECM) proteins, which, additionally to providing a scaffold for cells, play key roles in determining cell phenotype and performance.

Complete answer:
Connective tissues are the tissues that connect the different parts of the body and provide the framework to the body. Connective tissue is formed from individual cells that are embedded in an extracellular matrix. The cells of connective tissue are fibroblasts. The matrix is made up of ground substances and fibers such as collagen and elastic fibers which are secreted by the fibroblast cells.

Additional Information: Fibroblast, the principal active cell of connective tissue. Fibroblasts are huge, flat, prolonged (spindle molded) cells having measures reaching out from the closures of the cell body. The cell nucleus is flat and oval. Fibroblasts produce tropocollagen, which is the forerunner of collagen, and ground substance, an amorphous gel-like matrix that fills the spaces between cells and fibers in animal tissue.
Fibroblasts are motile, ready to complete mitosis, and can incorporate whichever connective tissue is required. Macrophages, lymphocytes, and, sporadically, leukocytes can be found in a portion of the tissues. A few tissues have particular cells that are not found in others.
So the correct answer is ‘ Fibroblast cell’.

Note: Fibroblasts appear to play a crucial role in wound healing, and this activity is assumed to be regulated by cells referred to as fibrocytes residing within the tissue stroma. Following tissue injury, fibroblasts relocate to the area of the injury, where they store new collagen and encourage the recuperating cycle.