The functioning of protective barriers involves several mechanisms:
Selective Permeability: Cellular membranes exhibit selective permeability, allowing the passage of essential nutrients while blocking harmful substances. This selectivity is achieved through specific transport proteins and channels. Detoxification Processes: Enzymatic reactions, such as those carried out by the cytochrome P450 enzyme system, play a critical role in detoxifying harmful chemicals. These processes often involve biotransformation, making substances more water-soluble for excretion. Immune Response: The immune system can recognize and eliminate toxic agents through processes like phagocytosis and the production of antibodies. This response is vital in preventing the spread of toxic substances throughout the body.
