Resting nerve cell membranes are more permeable to A. Organic anions

1.	Resting nerve cell membranes are more permeable to A. Organic anions than to Cl- anions. B. K+ ions than to Cl- ions. C. Na+ ions than to K+ ions. D. Oxygen molecules than to glucose molecules. E. Water molecules than to H+ ions.
Answer» A. False Organic anions cannot cross the membrane readily. B. False The permeability to Cl^- is about twice that to K⁺. C. False K⁺ permeability is about 100 times that of Na⁺. D. True O₂, being a small, nonpolar, lipophilic molecule dissolves in the membrane lipid and crosses more easily than the larger glucose molecule. E. True The bilipid layer is more permeable to water than to the charged hydrogen ion.

Resting nerve cell membranes are more permeable to A. Organic anions than to Cl- anions. B. K+ ions than to Cl- ions. C. Na+ ions than to K+ ions. D. Oxygen molecules than to glucose molecules. E. Water molecules than to H+ ions.

Answer»

A. False Organic anions cannot cross the membrane readily.

B. False The permeability to Cl^- is about twice that to K⁺.

C. False K⁺ permeability is about 100 times that of Na⁺.

D. True O₂, being a small, nonpolar, lipophilic molecule dissolves in the membrane lipid and crosses more easily than the larger glucose molecule.

E. True The bilipid layer is more permeable to water than to the charged hydrogen ion.

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Resting nerve cell membranes are more permeable to A. Organic anions than to Cl- anions. B. K+ ions than to Cl- ions. C. Na+ ions than to K+ ions. D. Oxygen molecules than to glucose molecules. E. Water molecules than to H+ ions.

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