 
			 
			MCQOPTIONS
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				| 1. | The ion most abundant in cells and most permeable to cell membrane is ____________ | 
| A. | K<sup>+</sup> | 
| B. | Ca<sup>2+</sup> | 
| C. | Na<sup>+</sup> | 
| D. | H<sup>+</sup> | 
| Answer» B. Ca<sup>2+</sup> | |