Examlex
Which of the following is TRUE of social smiling?
Free Energy
The portion of a system's energy that is able to perform work when temperature and pressure are uniform throughout the system.
Concentration Gradient
A concentration gradient is a variation in the concentration of a substance across a space or a membrane, leading to the movement of particles from an area of higher concentration to an area of lower concentration.
Expend Energy
The act of using biological or mechanical power for physical activities, processes, or to accomplish tasks.
Cell
The basic structural and functional unit of life, which consists of living material enclosed by a membrane.
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