The membrane is selectively permeable because substances do not cross it indiscriminately. Some molecules, such as hydrocarbons and oxygen can cross the membrane. Many large molecules (such as glucose and other sugars) cannot. Water can pass through between the lipids. Ions such as H+ or Na+ cannot.
So I think the answer is D) It lets certain Substances pass through but not others.
Amount of food in the stomach. You could be absolutely full but the alcohol is still going to absorb into your blood stream at the same rate as if you were empty.
Explanation: It is still a career in health science because some people have to make the drugs and they have to get approved to work there like a pharmacy technician.
