In a plasma membrane, how do the tails of the phospholipid molecules line up?

they alternate with the heads.
they stick out with the heads in the center.
they tangle randomly to form a fiber.
they are sandwiched between two layers of heads.

They are sandwiched between two layers of heads

Explanation:

1. the energy lost to disorder metabolism     -entropy

2. related to or possessing motion potential     -kinetic

3. all of the chemical reactions in an organism required for maintenance of the processes of life entropy     -metabolism

4. possible; ability to go into action or perform work kinetic     -potential

5. the study of energy and its transformations thermodynamics     -thermodynamics