The organic portion of matrix is important in providing all but a. tensile strength b. hardness c. ability to resist stretch d. flexibility.

Video transcript

Hi, everyone. Welcome back. Our next question says which one of the following features of bone is associated with the inorganic portion of the matrix. A hardness and rigidity. B, tensile strength C elasticity or D cellular activity. So let's think about what the inorganic portion of the matrix is and what it's composed of. And it's primarily composed of calcium salts, particularly hydroxy appetite crystals. So when we think of crystals, we think of calcium, we think of minerals that leads us to our answer choice which is choice, a hardness and rigidity, which is what's provided by this inorganic portion. When we look at our other answer, choices, choice B, tensile strength and choice C elasticity. Both of these are provided by the organic portion of the matrix consisting of primarily of collagen and some other proteins. So again, if your bone was just this, these calcium salts, just this totally rigid brittle structure, it would break much more easily. Um So the tensile strength and elasticity are important for lending some extra resilience to the bone, but it's not associated with the inorganic portion. But the organic portion. And then finally, choice d cellular activity, we know that the uh matrix uh being composed of these organic and inorganic materials doesn't have cells composing it. So, cellular activity would be composed of the cells within the bone. And those would be for instance, osteoblasts and osteoclasts. So these would be responsible for that cellular activity. So that would not be the answer, not the inorganic portion. So again, which feature of bone associated with the inorganic portion? Choice, a hardness and rigidity. See you in the next video.