[问答题]
Below is a diagram ofqz0y fm(a)zo ,mpf r*( a motorqfurd b.x2p44 lsq dg ;f1.4jd neuron. Neurons are the longest cells in the human bo;fp24 f ds4uqbgd14 .dxrlj.qdy.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.
