Answer by Shania60. Confidence votes 21. the function of a muscle cell is, by definition, to move. this can be accomplished when the cell contracts. contracting makes it denser, which is why when you feel a relaxed muscle in your arm suddenly tense up, it hardens.nswer by Shania60. Confidence votes 21. the function of a muscle cell is, by definition, to move. this can be accomplished when the cell contracts. contracting makes it denser, which is why when you feel a relaxed muscle in your arm suddenly tense up, it hardens.
Cobwebs and spider webs are different things. Spiderwebs are spun from their silk, and you will usuallysee the spider at home in the web. Cobwebs are a mixture of dust and whatever glues the dust together-sorry-I can't be more specific on that part.
Best Answer: to add on renie's... a group of spiders, which many are the various types that get inside homes and structure are referred to as cob spiders..their webs look to be a mass of webbing rather a design such as made by orb spiders. Over time dust sticks and covers the webbing causing the cobweb look'.