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This question gives us a series of statements about growth factors and asks us to identify which one is correct.
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Growth factors are generally present in the body as polypeptides.
00:17
They attach to the binding site on a target cell surface and induce that cell to grow and multiply.
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And lastly, growth factors are produced by many different kinds of cells, like cartilage cells, bone cells, and blood cells.
00:35
With all of this in mind, let's go back to our statements.
00:38
Part a asserts that growth factors are local regulators that are produced by the anterior pituitary.
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Looking at what we've learned, we see that this isn't quite correct.
00:48
Growth factors might be produced inside the anterior peduitary, but they can also be produced in places like cartilage, bone, and blood cells, making part a incorrect.
00:58
Part b, states that growth factors are modified fatty acids, and they stimulate both cartilage and bone growth...