Question

Which statement about extracellular matrix is accurate?


It varies in consistency based on the amount of protein fibers and fluid.


It creates the blood vessels and capillaries found in cartilage.


It provides oxygen and nutrients to bone, which does not have blood vessels.


It is essential for the formation of neurons.

Answer 1

Answer:

The most correct answer is: It varies in consistency based on the amount of protein fibers and fluid

Explanation:

The extracellular matrix (ECM) is the environment surrounding cells, which is normally composed by fibers (i. e.: collagen, elastin, etc...), soluble proteins and other macromolecules (such as hyaluronic acid) embedded in fluid. The relative concentration and composition of those components conditions, among other things, the physical consistency of the ECM.

• No blood vessel arises from ECM; they derive from specific precursor cells. Additionally, cartilage is an avascular (has no blood vessel) type of connective tissue.

• ECM does provide oxygen and nutrients to diverse tissue, including bone, however bone tissue does have blood vessels.

• Neuronogenesis (generation of new neurons) takes place within the developing nervous system, with neuronal precursor cells being thoroughly surrounded by other cells such as radial glia. Typically, neighboring ECM has a minor or negligible role in this process.

Answer 2

it varies in consistency based on the amount of protein fibres and fluid is the accurate statement