A.) Multicellular <span>organisms are made up of many different groups of specialized cells
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<span>The correct answer is B. Lack of water. When there's no water and you start to dehydrate, your salivary glands start working extra hard because your mouth can't be dry and the salivary glands produce saliva to keep the mouth and the throat dry. If your throat and mouth are dry you can't even swallow.</span>
Explanation:
B. cell,tissue, organ, organ system
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A is a dendrite it receives impulses from other neurons and carry them to the cell body
B I think is the Myelin sheath it helps the transmission of electrical impulses
C is Axon terminal it releases neurotransmitters
