Which of the following is a component of the plasma membrane that creates a chemical barrier between the inside and the outside of the cell?
cholesterol
water
proteins
phospholipids

answer; ///i believe that the correct answer is (e); check first good

just go with your heart buddy

b brown mice / white sand dunes

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.