Question

small nonpolar molecules can cross, but ions and most they are repelled by the nonpolar fatty acid tails. some are able to pass through, but they do so at a slow rate. which of the following molecules can pass through the all that apply. water, a very small polar molecule oxygen, a small nonpolar molecule glucose, a large polar molecule sodium ion, a charged molecule

Explanation:

Small non - polar molecules like oxygen can pass through cell membranes easily. Water, although polar and small, can pass through via osmosis or aquaporins. Large polar molecules like glucose can pass through with the help of transport proteins. Charged molecules like sodium ions require ion channels or active transport mechanisms to cross the membrane but can still cross under certain conditions.

Answer:

water, a very small polar molecule; oxygen, a small nonpolar molecule; glucose, a large polar molecule; sodium ion, a charged molecule