Cytoskeleton vs. Extracellular matrix?

[swindoll]

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Could someone discuss the differences between these two? Microfilaments and microtubules make up cytoskeleton but not extracellular matrix? First Bootcamp Bio exam has a question about microfilaments, and the explanation implies that extracellular matrix does not have microfilaments. But microfilaments are present in the cytoskeleton, correct? Thank you!

 

[emminent]

ECM (extracellular matrix) is outside of the cell beyond the glycoproteins/glycocalyx. If you have feralis it said it in there but has collagen/fibronectin/integrins.

Cytoskeleton has microtubules (made of tubulin) intermediate filaments (keratin) and microfilaments (actin). Microfilaments is also known as thin actin microfilaments which is part of the sarcomere and interacts with myosin heads for muscle movement. Actin microfilaments also take part in cell cleavage/cleavage furrow.

Microtubules inside the cell take part in flagella composition 9x2/spindle apparatus. Can't think of anything more for now but they're all in cliff's or feralis. Use control F and it'll be easier to navigate.