Which substances are absorbed by simple diffu | vedclass

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(C) Simple diffusion is the process by which molecules move from a region of higher concentration to a region of lower concentration without the expen

Vedclass · Accepted Answer

Fatty acid,glycerol

Vedclass · Answer

(C) Simple diffusion is the process by which molecules move from a region of higher concentration to a region of lower concentration without the expenditure of energy.Small amounts of monosaccharides like glucose,amino acids,and some electrolytes like $Cl^-$ are generally absorbed by simple diffusion.However,fatty acids and glycerol,being insoluble in water,cannot be absorbed into the blood directly.They are first incorporated into small droplets called micelles,which move into the intestinal mucosa,where they are re-synthesized into chylomicrons and transported into the lymph vessels (lacteals).Among the given options,the most accurate representation of substances absorbed via diffusion (often involving facilitated transport or simple diffusion depending on concentration gradients) is typically associated with small molecules.Note: In standard $NCERT$,fatty acids and glycerol are absorbed via micelles,while glucose and amino acids are absorbed by facilitated transport or active transport. Given the options provided,there is a technical ambiguity; however,simple diffusion is the primary mechanism for substances like certain electrolytes and small non-polar molecules.

Which substances are absorbed by simple diffusion?

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