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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Plasma membrane is freely permeable to -
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The correct answer is  Ans. is 'd' i.e., Alcoholo As the major middle portion of membrane (core of the membrane) is formed by hydrophobic region of phospholipids, this portion is impermeable to the usual water-soluble substances, such as ions, glucose and urea.o Conversely, fat-soluble substances, such as oxygen, carbon dioxide, and alcohol, can penetrate this portion of the membrane with ease.o Permeability coefficient and permeability of some important molecules in increasing order of frequency are Na+ < K+ < Cl- < Glucose < Tryptophan < Urea = Glycerol< Indole < H2O.