Do most polar molecules freely cross the lipid cells

Question 1: Do most polar molecules freely cross the lipid cells membrane? Name two groups of polar molecules.

Question 2: What is the name for the special case of diffusion that involves the movement of water molecules across a membrane?

Question 3: Why is a molecule of urea unable to diffuse across the membrane?

Question 4: How does a urea molecule interact with water molecules? Why?

Question 5: Why is there now a net movement of water molecules? Which direction do they move?

Questtion 6: What happens to the water level on the side of the beaker why the water molecules are moving into?

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Do most polar molecules freely cross the lipid cells : question 1 do most polar molecules freely cross the lipid cells membrane? name two groups of polar molecules.question 2

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