Examlex
Find the sum.
Passive Transport
The movement of substances across a cell membrane without the need for energy input, down their concentration gradient.
Facilitated Diffusion
A transport mechanism for molecules across the cell membrane via protein channels, without energy expenditure.
Energy Expenditure
The total amount of energy used by the body per day, encompassing basal metabolic rate, physical activity, and the energy used in digesting and metabolizing food.
Plasma Membrane
The semipermeable membrane surrounding the cytoplasm of a cell, responsible for controlling the passage of substances in and out.
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