No, organisms (any living being) made of one cell are classified as unicellular. Although anything made of two or more cells are multicellular. Although this is off topic, anything acellular is lacking cells (though it is controversial whether any acellular organism is living or not.)
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Answer: Cover 45% to 50% of the arm circumference
Explanation: Using of a blood pressure cuff can sometimes be an herculean tasks. It is required to use the right size not too large and not too small so as to get the most precise blood pressure readings.
It is required when measuring your blood pressure, that a proper size cuff is used. It is also very important that the bladder (inflatable part) of the blood pressure cuff should cover atleast 45% to 50% of the arm circumference.
Answer: Honest Awnser
I'm going to be briefly honest with you. I'm not sure if this is a real question or one simply because you're feeling this way. If you're wanting to starve yourself due to depression/feeling bigger. I would simply first talk with someone such as an adult or a doctor to seek help and guidance if you're in need of it. There is no way of just stopping yourself if it is a severe wanting to do something such as starve yourself. But, if it isn't severe I'd slowly move yourself to eat, starting with small snacks to small meals slowly. Don't overdo it by making yourself each a huge meal, but slowly add up to a normal meal.