1.

Different processes facilitating absorption of digested food. 

Answer»

Simple diffusion – Movement of molecules along the concentration gradient of molecules without any requirement of energy. (some glucose, amino acids, chloride ions). 

Active transport – Movement of molecules across semipermeable membrane against the concentration gradient requiring energy from ATP (amino acids, glucose, sodium). 

Facilitated Diffusion: Diffusion of some ions and polar molecules across membranes through special transport proteins (fructose and some amino acids). 

Osmosis: Movement of water molecules across semi permeable membrane from a region of their higher concentration to a region of their lower concentration (transport of water). 



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