CELL MEMBRANE-FACTORS AFFECTING TRANSPORT
From NeuroRehab.wiki
SUMMARY
1. How small it is? Smaller the better.
2. Electrical charge on the surface of the substance.
3. Lipid solubility: fat soluble is good.
Reference(s)
Barrett, K.E., Barman, S.M., Brooks, H.L., X, J. and Ganong, W.F. (2019). Ganong’s review of medical physiology. 26th ed. New York: Mcgraw-Hill Education