Question

Growth factors are local regulators that:

• A. are produced by the anterior pituitary
• B. are modified fatty acids that stimulate bone and cartilage growth
• C. are proteins that bind to surface receptors and stimulate target cells growth and development
• D. include histamines and interleukins and are necessary for cellular differentiation

Answer 1

The correct option is C are proteins that bind to surface receptors and stimulate target cells growth and development

A growth factor is a naturally occurring substance capable of stimulating cellular growth, proliferation, healing, and cellular differentiation. Usually, it is a protein or steroid hormone. They are important in regulating a variety of cellular processes. Growth factor typically acts as signaling molecule between cells. Examples are cytokines and hormones that bind to specific receptors on the surface of their target cells.

So the correct answer is are proteins that bind to the surface receptors and stimulate target cells growth and development.