What molecule regulates the fluidity of the bilayer? what structure would bilayer form without it? c. water requires integral proteins called aquaporins to move across membrane. why does water need this protein to move across the membrane? d. give an example of an amino acid that would line the interior of an aquaporin that comes into contact with water.

just did the assignment and the answer was #1 +2 n

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".

the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.