<span>This result is produced by the selective permeability of the plasma membrane when the presence of negatively charged ions does not diffuse into the cell and the action of several sodium-potassium pump units causes an unequal distribution of charges through the membrane.</span>
This is in accordance to the number of calories each gram of macronutrient has. 1 gram of carbohydrates contains 4 calories; 1 gram of protein contains 4 calories; and 1 gram of fat contains 9 calories; (nice to know: 1 gram of alcohol contains 7 calories). In this case, the sandwich contains 460 wherein there is 6 grams of saturated fat. This 6 grams of saturated fat is equal to 54 calories. Converting that into percentage: (54 calories of fat)/(460 total calories) x 100 = 11.74% or roughly 12% of calories are from saturated fat.
