Channel proteins are a type of transport protein or permease that provides a tube like opening in the plasma membrane through which particles can diffuse through. This is primarily one distinction between the 2 mechanisms or processes of simple diffusion. Facilitated diffusion and simple or passive diffusion. The use of these specific proteins.
Most cells have a membrane, though some don't.
To digest means your body reacts to what u consume
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During exhalation, the diaphragm also relaxes, moving higher into the thoracic cavity. This increases the pressure within the thoracic cavity relative to the environment. Air rushes out of the lungs due to the pressure gradient between the thoracic cavity and the atmosphere.
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The Last Universal Common Ancestor (LUCA) is the most recent common ancestor of all current life on Earth, estimated to have lived some 3.5 to 3.8 billion years ago
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