In most environments and cells themselves, there are several substances that move in and out of the cell
membrane. Describe how easily these substances could
cross the membrane: water, protein, carbohydrate, salt,
and oxygen.
Then, justify your answer referencing the membrane
structure and structure of the substances.

The cells membrane is selectively permeable, meaning only certain substances can easily pass through it. Only small, non polar molecules can easily pass through the small spaces between the hydrophobic heads and phospholipids. Water would have trouble due to it being a polar molecule. Proteins and carbs are quite large, making it difficult for them to pass through. Salt, which ionizes water, would also have difficulty passing through as it is a charged particle. Oxygen, on the other hand, is a non polar molecule that is small, so it can easily pass through the phospholipid bilayer.

Step-by-step explanation:

i am not sure :

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