有些粒子是细胞正常工作所需，但又无法自由扩散穿过细胞膜，这些粒子就通过膜运输蛋白或胞吞作用进入细胞。膜脂（英语：Membrane lipids）膜蛋白磷脂双分子层膜的流动性（英语：Membrane fluidity）渗透 Brown 参考文献 von Heijne G, Rees D. Membranes:

梯形烷

and M. S. M. Jetten. Linearly concatenated cyclobutane lipids form a dense bacterial membrane. Nature. 2002, 419 (6908): 708–712. PMID 12384695. doi:10

溶劑化

Water Facilitates Energy Transfer by Inducing Extended Vibrations in Membrane Lipids, J Phys Chem, 2012 http://pubs.acs.org/doi/abs/10.1021/jp302478a （页面存档备份，存于互联网档案馆）

脂類

lipids_in_chloroplast_membranes?ev=prf_pub Stryer et al., pp. 333–34. van Meer G, Voelker DR, Feigenson GW. Membrane lipids: where they are

棘紅細胞

Durocher, John R.; Leslie, Mary H. Decreased Fluidity of Red Cell Membrane Lipids in Abetalipoproteinemia. Journal of Clinical Investigation. 1977-07-01

Found in articles

生物膜

梯形烷

and M. S. M. Jetten. Linearly concatenated cyclobutane lipids form a dense bacterial membrane. Nature. 2002, 419 (6908): 708–712. PMID 12384695. doi:10

溶劑化

脂類

lipids_in_chloroplast_membranes?ev=prf_pub Stryer et al., pp. 333–34. van Meer G, Voelker DR, Feigenson GW. Membrane lipids: where they are

棘紅細胞

Durocher, John R.; Leslie, Mary H. Decreased Fluidity of Red Cell Membrane Lipids in Abetalipoproteinemia. Journal of Clinical Investigation. 1977-07-01