Examlex
According to the concepts of plate tectonics, the continents of Africa and South America are gradually changing their distance from each other.
Concentration Gradient
A variation in the concentration of a substance across a distance.
Glucose Transporter
Proteins located in cell membranes that assist in the transport of glucose molecules into and out of cells, facilitating the use of glucose for energy.
Facilitated Diffusion
A process of passive transport, with no energy consumption, where molecules move across a cellular membrane via protein channels.
Active Transport
The movement of substances across a cell membrane against a concentration gradient, requiring energy.
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